Intermediate film for laminated glass, multi-layer intermediate film for laminated glass, and laminated glass

ABSTRACT

There is provided an interlayer film for laminated glass with which the visible light transmittance and the heat resistance of the laminated glass can be heightened. The interlayer film for laminated glass according to the present invention includes an organic coloring matter containing a transition element, a metal element which is different from a metal element contained in a metal oxide particle and different from a transition element, a thermoplastic resin and a plasticizer.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a Continuation Application of patent applicationSer. No. 14/898,107, filed on Dec. 11, 2015, which is a 371 applicationof Application Serial No. PCT/JP2014/065812, filed on Jun. 13, 2014,which is based on Japanese Patent Application Nos. 2013-125728 filedJun. 14, 2013, and 2014-014942 and 2014-014943, filed on Jan. 29, 2014,the entire contents of which are hereby incorporated by reference.

TECHNICAL FIELD

The present invention relates to an interlayer film for laminated glassand a multilayer interlayer film for laminated glass which are used forobtaining laminated glass. Moreover, the present invention relates tolaminated glass prepared with the interlayer film for laminated glass orthe multilayer interlayer film for laminated glass.

BACKGROUND ART

Since laminated glass generates only a small amount of scattering glassfragments even when subjected to external impact and broken, laminatedglass is excellent in safety. As such, the laminated glass is widelyused for automobiles, railway vehicles, aircraft, ships, buildings andthe like. For example, the laminated glass is produced by sandwiching anintermediate film for laminated glass between a pair of glass plates.

The following Patent Document 1 discloses an interlayer film forlaminated glass containing a tetraazaporphyrin compound.

The following Patent Document 2 discloses an interlayer film obtained byusing a plasticized polyvinyl acetal resin composition. The plasticizedpolyvinyl acetal resin composition contains 100 parts by weight of apolyvinyl acetal resin, 20 to 60 parts by weight of a plasticizer, 0.1to 3 parts by weight of at least one kind of fine particles selectedfrom the group consisting of tin-doped indium oxide (ITO) fineparticles, antimony-doped tin oxide (ATO) fine particles, aluminum-dopedzinc oxide (AZO) fine particles, indium-doped zinc oxide (IZO) fineparticles, tin-doped zinc oxide fine particles, silicon-doped zinc oxidefine particles, lanthanum hexaboride fine particles and ceriumhexaboride fine particles, and 0.00001 to 5 parts by weight of at leastone kind of a compound selected from the group consisting of adiimonium-based coloring matter, an aminium-based coloring matter, aphthalocyanine-based coloring matter, an anthraquinone-based coloringmatter, a polymethine-based coloring matter, a benzenedithiol typeammonium-based compound, a thiourea derivative and a thiol metalcomplex.

The following Patent Document 3 discloses an interlayer film which ishigh in ultraviolet ray blocking characteristics and capable ofmaintaining the optical quality over a long period of time. Thisinterlayer film contains a polymer layer. The polymer layer contains atungsten oxide reagent and at least one kind among a molecule having abenzotriazole group and a polyvalent metal salt.

RELATED ART DOCUMENT Patent Document

Patent Document 1: JP 2010-138028 A

Patent Document 2: WO 03/018502 A1

Patent Document 3: US 2009/0035583 A1

SUMMARY OF THE INVENTION Problems to be Solved by the Invention

In laminated glass prepared with such a conventional interlayer filmdescribed in Patent Documents 1 to 3, there are cases where it isdifficult to sufficiently heighten the visible light transmittance ofthe laminated glass. Furthermore, there are cases where the heatresistance of the laminated glass is lowered. Moreover, in laminatedglass prepared with the conventional interlayer film, it is difficult tosufficiently lower the visible light transmittance, sufficientlyheighten the heat resistance and also heighten the heat shieldingproperties.

An object of the present invention is to provide an interlayer film forlaminated glass and a multilayer interlayer film for laminated glasswith which the visible light transmittance and the heat resistance ofthe laminated glass can be heightened. Moreover, an object of thepresent invention with limitation is to provide an interlayer film forlaminated glass and a multilayer interlayer film for laminated glasswith which the heat shielding properties can be heightened, as well asthe visible light transmittance and the heat resistance can beheightened. Moreover, the present invention is also aimed at providinglaminated glass prepared with the interlayer film for laminated glass orthe multilayer interlayer film for laminated glass.

Means for Solving the Problems

According to a broad aspect of the present invention, there is providedan interlayer film for laminated glass including an organic coloringmatter containing a transition element, a metal element different from atransition element, a thermoplastic resin and a plasticizer.

In a specific aspect of the interlayer film for laminated glassaccording to the present invention, the metal element is a polyvalentmetal element.

In a specific aspect of the interlayer film for laminated glassaccording to the present invention, the content of the metal element isgreater than or equal to 20 ppm and less than or equal to 200 ppm.

In a specific aspect of the interlayer film for laminated glassaccording to the present invention, the metal element different from thetransition element is magnesium, and the metal element different fromthe transition element is added as magnesium acetate or magnesium2-ethylbutyrate to be contained.

In a specific aspect of the interlayer film for laminated glassaccording to the present invention, the transition element in theorganic coloring matter containing a transition element is copper orvanadium, and the organic coloring matter containing a transitionelement is a phthalocyanine compound or a naphthalocyanine compound.

In a specific aspect of the interlayer film for laminated glassaccording to the present invention, the maximum absorption wavelength ofthe organic coloring matter containing a transition element is greaterthan or equal to 550 nm and less than or equal to 750 nm.

In a specific aspect of the interlayer film for laminated glassaccording to the present invention, the interlayer film further includesmetal oxide particles.

In a specific aspect of the interlayer film for laminated glassaccording to the present invention, the metal oxide particles aretin-doped indium oxide particles or tungsten oxide particles.

In a specific aspect of the interlayer film for laminated glassaccording to the present invention, the thermoplastic resin is apolyvinyl acetal resin.

According to a broad aspect of the present invention, there is provideda multilayer interlayer film for laminated glass including an infraredray reflection layer reflecting infrared rays and a first resin layercontaining a thermoplastic resin, wherein the first resin layer isarranged on a first surface side of the infrared ray reflection layer,and the first resin layer is the above-described interlayer film forlaminated glass.

In a specific aspect of the multilayer interlayer film for laminatedglass according to the present invention, the multilayer interlayer filmincludes the infrared ray reflection layer reflecting infrared rays, thefirst resin layer containing a thermoplastic resin and a second resinlayer containing a thermoplastic resin, wherein the first resin layer isarranged on the first surface side of the infrared ray reflection layer,the second resin layer is arranged on a second surface side opposite tothe first surface of the infrared ray reflection layer, and at least thefirst resin layer among the first resin layer and the second resin layeris the above-described interlayer film for laminated glass.

The infrared ray reflection layer has a characteristic having theinfrared ray transmittance of 50% or less at one or more wavelengthwithin the range of 780 to 2100 nm.

In a specific aspect of the multilayer interlayer film for laminatedglass according to the present invention, the infrared ray reflectionlayer is a resin film with metal foil, a multilayer laminated film inwhich a metal layer and a dielectric layer are formed on a resin layer,a multilayer resin film or a liquid crystal film.

In a specific aspect of the multilayer interlayer film for laminatedglass according to the present invention, the infrared ray transmittancein the wavelength range of 780 to 2100 nm of the first resin layer ishigher than the infrared ray transmittance in the wavelength range of780 to 2100 nm of the second resin layer.

In a specific aspect of the multilayer interlayer film for laminatedglass according to the present invention, the thermoplastic resincontained in the first resin layer is a polyvinyl acetal resin, and inthe specific aspect thereof, the thermoplastic resin contained in thesecond resin layer is a polyvinyl acetal resin.

In a specific aspect of the multilayer interlayer film for laminatedglass according to the present invention, the first resin layer containsa plasticizer, and in the specific aspect thereof, the second resinlayer contains a plasticizer.

In a specific aspect of the multilayer interlayer film for laminatedglass according to the present invention, the first resin layer containsan ultraviolet ray shielding agent, and in the specific aspect thereof,the second resin layer contains an ultraviolet ray shielding agent.

According to a broad aspect of the present invention, there is providedlaminated glass including a first laminated glass member, a secondlaminated glass member and the above-described interlayer film forlaminated glass or the above-described multilayer interlayer film forlaminated glass, wherein the interlayer film for laminated glass or themultilayer interlayer film for laminated glass is arranged between thefirst laminated glass member and the second laminated glass member.

Effect of the Invention

Since the interlayer film for laminated glass according to the presentinvention includes an organic coloring matter containing a transitionelement, a metal element different from a transition element, athermoplastic resin and a plasticizer, the visible light transmittanceand the heat resistance of laminated glass prepared with the interlayerfilm for laminated glass according to the present invention can beheightened.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a cross-sectional view schematically showing a multilayerinterlayer film for laminated glass in accordance with one embodiment ofthe present invention.

FIG. 2 is a cross-sectional view schematically showing an interlayerfilm for laminated glass in accordance with one embodiment of thepresent invention.

FIG. 3 is a cross-sectional view schematically showing an example oflaminated glass prepared with the multilayer interlayer film forlaminated glass shown in FIG. 1.

FIG. 4 is a cross-sectional view schematically showing an example oflaminated glass prepared with the interlayer film for laminated glassshown in FIG. 2.

MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the details of the present invention will be described.

The interlayer film for laminated glass (hereinafter, sometimesabbreviated as the interlayer film) according to the present inventionincludes an organic coloring matter containing a transition element(hereinafter, sometimes described as an organic coloring matter X), ametal element different from a transition element (hereinafter,sometimes described as a metal element Y), a thermoplastic resin and aplasticizer. The interlayer film according to the present invention doesnot include or includes metal oxide particles.

Since the interlayer film for laminated glass according to the presentinvention includes the above-described configuration, in laminated glassprepared with the interlayer film for laminated glass according to thepresent invention, it is possible 1) to heighten the visible lighttransmittance (Visible Transmittance) and furthermore, 2) to heightenthe heat resistance.

Furthermore, in laminated glass prepared with the interlayer filmaccording to the present invention, it is possible not only 1) toheighten the visible light transmittance and 2) to heighten the heatresistance but also 3) to heighten the heat shielding properties. Inparticular, in the case where the interlayer film according to thepresent invention includes heat shielding particles such as metal oxideparticles, in the laminated glass, it is possible 3) to further heightenthe heat shielding properties. In the case where the interlayer filmaccording to the present invention is used in a multilayer interlayerfilm described below, in laminated glass prepared with the resultingmultilayer interlayer film, it is possible 3) to further heighten theheat shielding properties.

By allowing the interlayer film according to the present invention toinclude the above-described configuration, in laminated glass preparedwith the interlayer film according to the present invention, any ofeffects of the above-mentioned 1), the above-mentioned 2) and theabove-mentioned 3) can be enhanced. It has hitherto been difficult toallow the effects of all of the above-mentioned 1), the above-mentioned2) and the above-mentioned 3) to be exerted in an interlayer film. Incontrast, the present inventors have found a configuration enabling theeffects of all of the above-mentioned 1), the above-mentioned 2) and theabove-mentioned 3) to be exerted. In the present invention, it ispossible to obtain the effects of 1) high visible light transmittance,2) high heat resistance and 3) high heat shielding properties, thecombination of which has hitherto been difficult to be obtained, incombination.

The multilayer interlayer film for laminated glass (hereinafter,sometimes abbreviated as the multilayer interlayer film) according tothe present invention is provided with an infrared ray reflection layerreflecting infrared rays and a first resin layer containing athermoplastic resin. The multilayer interlayer film for laminated glassaccording to the present invention is preferably provided with aninfrared ray reflection layer reflecting infrared rays, a first resinlayer containing a thermoplastic resin and a second resin layercontaining a thermoplastic resin. In the multilayer interlayer filmaccording to the present invention, the first resin layer is arranged ona first surface side of the infrared ray reflection layer. In the casewhere the multilayer interlayer film according to the present inventionis provided with the second resin layer, the second resin layer isarranged on a second surface side opposite to the first surface of theinfrared ray reflection layer. In the case where the multilayerinterlayer film according to the present invention is not provided withthe second resin layer, the first resin layer constitutes the interlayerfilm according to the present invention, and thus, the first resin layercontains an organic coloring matter X, a metal element Y, athermoplastic resin and a plasticizer. In the case where the multilayerinterlayer film according to the present invention is provided with thesecond resin layer, at least the first resin layer among the first resinlayer and the second resin layer constitutes the interlayer filmaccording to the present invention. In the multilayer interlayer filmaccording to the present invention, only the first resin layer mayconstitute the interlayer film according to the present invention, andthus, only the first resin layer may contain an organic coloring matterX, a metal element Y, a thermoplastic resin and a plasticizer. Both ofthe first resin layer and the second resin layer may constitute theinterlayer film according to the present invention, and thus, both ofthe first resin layer and the second resin layer may contain an organiccoloring matter X, a metal element Y, a thermoplastic resin and aplasticizer.

The multilayer interlayer film according to the present inventionenables the effects of all of the above-mentioned 1), theabove-mentioned 2) and the above-mentioned 3) to be exerted at a higherlevel.

Hereinafter, specific embodiments of the present invention will bedescribed with reference to the drawings.

FIG. 1 is a cross-sectional view schematically showing a multilayerinterlayer film for laminated glass in accordance with one embodiment ofthe present invention.

The multilayer interlayer film 11 shown in FIG. 1 is a multilayerinterlayer film having a two or more-layered structure. The multilayerinterlayer film 11 is used to obtain laminated glass. The multilayerinterlayer film 11 is a multilayer interlayer film for laminated glass.The multilayer interlayer film 11 is provided with a first resin layer1, a second resin layer 2 and an infrared ray reflection layer 3. Thefirst layer 1 is arranged on a first surface 3 a of the infrared rayreflection layer 3 to be layered thereon. The second resin layer 2 isarranged on a second surface 3 b opposite to the first surface 3 a ofthe infrared ray reflection layer 3 to be layered thereon. The infraredray reflection layer 3 is an intermediate layer. Each of the first resinlayer 1 and the second resin layer 2 is a protective layer and is asurface layer in the present embodiment. The infrared ray reflectionlayer 3 is arranged between the first resin layer 1 and the second resinlayer 2 to be sandwiched therebetween. Accordingly, the multilayerinterlayer film 11 has a multilayer structure (the first resin layer1/the infrared ray reflection layer 3/the second resin layer 2) in whichthe first resin layer 1, the infrared ray reflection layer 3 and thesecond resin layer 2 are layered in this order.

In the multilayer interlayer film 11, at least the first resin layer 1among the first resin layer 1 and the second resin layer 2 contains anorganic coloring matter X, a metal element Y, a thermoplastic resin anda plasticizer.

It is preferred that both of the first resin layer 1 and the secondresin layer 2 contain an organic coloring matter X, a metal element Y, athermoplastic resin and a plasticizer. In this case, the first resinlayer 1 and the second resin layer 2 may be the same as or differentfrom each other. The second resin layer 2 may not contain an organiccoloring matter X, may not contain a metal element Y, and may notcontain a plasticizer.

In this connection, other layers may be arranged between the first resinlayer 1 and the infrared ray reflection layer 3 and between the infraredray reflection layer 3 and the second resin layer 2, respectively. It ispreferred that each of the first resin layer 1 and the second resinlayer 2 be directly layered on the infrared ray reflection layer 3.Examples of the other layers include a layer containing a thermoplasticresin such as a polyvinyl acetal resin and a layer containingpolyethylene terephthalate and the like.

The first resin layer contains a thermoplastic resin. It is morepreferred that the thermoplastic resin in the first resin layer be apolyvinyl acetal resin. It is preferred that the first resin layercontain a plasticizer and it is more preferred that the first resinlayer contain a polyvinyl acetal resin and a plasticizer. It ispreferred that the first resin layer contain an ultraviolet rayshielding agent and it is preferred that the first resin layer containan oxidation inhibitor.

The second resin layer contains a thermoplastic resin. It is morepreferred that the thermoplastic resin in the second resin layer be apolyvinyl acetal resin. It is preferred that the second resin layercontain a plasticizer and it is more preferred that the second resinlayer contain a polyvinyl acetal resin and a plasticizer. It ispreferred that the second resin layer contain an ultraviolet rayshielding agent and it is preferred that the second resin layer containan oxidation inhibitor.

FIG. 2 shows an interlayer film for laminated glass in accordance withone embodiment of the present invention schematically represented as across-sectional view.

The interlayer film 11A shown in FIG. 2 is a single-layer interlayerfilm having a one-layer structure. The interlayer film 11A is used toobtain laminated glass. The interlayer film 11A is an interlayer filmfor laminated glass.

The interlayer film 11A (first layer) contains an organic coloringmatter X, a metal element Y, a thermoplastic resin and a plasticizer.

It is more preferred that the thermoplastic resin in the interlayer filmbe a polyvinyl acetal resin. It is preferred that the interlayer filmcontain an ultraviolet ray shielding agent and it is preferred that theinterlayer film contain an oxidation inhibitor.

(First Resin Layer and Second Resin Layer)

Hereinafter, the details of each ingredient contained in the interlayerfilm according to the present invention, and the first resin layer andthe second resin layer in the multilayer interlayer film according tothe present invention. In the following description, the first resinlayer and the second resin layer are sometimes described as theinterlayer film.

[Thermoplastic Resin]

Each of the interlayer film, the first resin layer and the second resinlayer contains a thermoplastic resin. The thermoplastic resin is notparticularly limited. As the thermoplastic resin, a conventionally knownthermoplastic resin can be used. One kind of the thermoplastic resin maybe used alone, and two or more kinds thereof may be combinedly used.

Examples of the thermoplastic resin include a polyvinyl acetal resin, anethylene-vinyl acetate copolymer resin, an ethylene-acrylic acidcopolymer resin, a polyurethane resin, a polyvinyl alcohol resin, andthe like. Thermoplastic resins other than these may be used.

It is preferred that the thermoplastic resin be a polyvinyl acetalresin. By using a polyvinyl acetal resin and a plasticizer together, theadhesive force of the interlayer film to a laminated glass member oranother interlayer film is further heightened.

For example, the polyvinyl acetal resin can be produced by acetalizingpolyvinyl alcohol with an aldehyde. For example, the polyvinyl alcoholcan be produced by saponifying polyvinyl acetate. The saponificationdegree of the polyvinyl alcohol generally lies within the range of 70 to99.9% by mole.

The average polymerization degree of the polyvinyl alcohol is preferablygreater than or equal to 200, more preferably greater than or equal to500, preferably less than or equal to 3500, more preferably less than orequal to 3000, and further preferably less than or equal to 2500. Whenthe average polymerization degree is greater than or equal to the abovelower limit, the penetration resistance of laminated glass is furtherenhanced. When the average polymerization degree is less than or equalto the above upper limit, the resin is easily formed into an interlayerfilm.

The average polymerization degree of the polyvinyl alcohol is determinedby a method in accordance with JIS K6726 “Testing methods for polyvinylalcohol”.

The number of carbon atoms of the acetal group contained in thepolyvinyl acetal resin is not particularly limited. The aldehyde used atthe time of producing the polyvinyl acetal resin is not particularlylimited. It is preferred that the number of carbon atoms of the acetalgroup in the polyvinyl acetal resin be 3 or 4. When the number of carbonatoms of the acetal group in the polyvinyl acetal resin is greater thanor equal to 3, the glass transition temperature of the interlayer filmis sufficiently lowered.

The aldehyde is not particularly limited. In general, as the aldehyde,an aldehyde with 1 to 10 carbon atoms is suitably used. Examples of thealdehyde with 1 to 10 carbon atoms include propionaldehyde,n-butyraldehyde, isobutyraldehyde, n-valeraldehyde,2-ethylbutyraldehyde, n-hexylaldehyde, n-octylaldehyde, n-nonylaldehyde,n-decylaldehyde, formaldehyde, acetaldehyde, benzaldehyde, and the like.Of these, propionaldehyde, n-butyraldehyde, isobutyraldehyde,n-hexylaldehyde or n-valeraldehyde is preferred, propionaldehyde,n-butyraldehyde or isobutyraldehyde is more preferred, andn-butyraldehyde is further preferred. One kind of the aldehyde may beused alone, and two or more kinds thereof may be combinedly used.

The content ratio of the hydroxyl group (the amount of hydroxyl groups)of the polyvinyl acetal resin is preferably greater than or equal to 15%by mole, more preferably greater than or equal to 18% by mole,preferably less than or equal to 40% by mole, and more preferably lessthan or equal to 35% by mole. When the content ratio of the hydroxylgroup is greater than or equal to the above lower limit, the adhesiveforce of the interlayer film is further heightened. Moreover, when thecontent ratio of the hydroxyl group is less than or equal to the aboveupper limit, the flexibility of the interlayer film is enhanced and thehandling of the interlayer film is facilitated. The content ratio of thehydroxyl group of the polyvinyl acetal resin is further preferablygreater than or equal to 24% by mole, especially preferably greater thanor equal to 27% by mole, further preferably less than or equal to 33% bymole, and especially preferably less than or equal to 32% by mole.

The content ratio of the hydroxyl group of the polyvinyl acetal resin isa value expressing the mole fraction determined by dividing the amountof ethylene groups to which the hydroxyl group is bonded by the totalamount of ethylene groups in the main chain in terms of percentage. Forexample, the amount of ethylene groups to which the hydroxyl group isbonded can be measured in accordance with JIS K6726 “Testing methods forpolyvinyl alcohol” or in accordance with ASTM D1396-92 to be determined.

The acetylation degree (the amount of acetyl groups) of the polyvinylacetal resin is preferably greater than or equal to 0.1% by mole, morepreferably greater than or equal to 0.3% by mole, further preferablygreater than or equal to 0.5% by mole, preferably less than or equal to30% by mole, more preferably less than or equal to 25% by mole, furtherpreferably less than or equal to 20% by mole, especially preferably lessthan or equal to 10% by mole, and most preferably less than or equal to5% by mole. When the acetylation degree is greater than or equal to theabove lower limit, the compatibility between the polyvinyl acetal resinand a plasticizer is heightened. When the acetylation degree is lessthan or equal to the above upper limit, the moisture resistance of theinterlayer film and laminated glass is enhanced.

The acetylation degree is a value expressing the mole fractiondetermined by dividing a value obtained by subtracting the amount ofethylene groups to which the acetal group is bonded and the amount ofethylene groups to which the hydroxyl group is bonded from the totalamount of ethylene groups in the main chain by the total amount ofethylene groups in the main chain in terms of percentage. For example,the amount of ethylene groups to which the acetal group is bonded can bemeasured in accordance with JIS K6728 “Testing methods for polyvinylbutyral” or in accordance with ASTM D1396-92.

The acetalization degree of the polyvinyl acetal resin (thebutyralization degree in the case of a polyvinyl butyral resin) ispreferably greater than or equal to 60% by mole, more preferably greaterthan or equal to 63% by mole, further preferably greater than or equalto 65% by mole, preferably less than or equal to 85% by mole, morepreferably less than or equal to 75% by mole, and further preferablyless than or equal to 70% by mole. When the acetalization degree isgreater than or equal to the above lower limit, the compatibilitybetween the polyvinyl acetal resin and a plasticizer is heightened. Whenthe acetalization degree is less than or equal to the above upper limit,the reaction time required for producing the polyvinyl acetal resin isshortened.

The acetalization degree is a value expressing the mole fractiondetermined by dividing the amount of ethylene groups to which the acetalgroup is bonded by the total amount of ethylene groups in the main chainin terms of percentage.

The acetalization degree can be measured by a method in accordance withJIS K6728 “Testing methods for polyvinyl butyral” or in accordance withASTM D1396-92.

In this connection, it is preferred that the content ratio of thehydroxyl group (the amount of hydroxyl groups), the acetalization degree(the butyralization degree) and the acetylation degree be calculatedfrom the results measured by a method in accordance with JIS K6728“Testing methods for polyvinyl butyral”. In the case where the polyvinylacetal resin is a polyvinyl butyral resin, it is preferred that thecontent ratio of the hydroxyl group (the amount of hydroxyl groups), theacetalization degree (the butyralization degree) and the acetylationdegree be calculated from the results measured by a method in accordancewith JIS K6728 “Testing methods for polyvinyl butyral”.

[Plasticizer]

From the viewpoint of further enhancing the adhesive force of theinterlayer film, each of the interlayer film and the first resin layercontains a plasticizer. From the viewpoint of further enhancing theadhesive force of the interlayer film, it is preferred that the secondresin layer contain a plasticizer.

The plasticizer is not particularly limited. As the plasticizer, aconventionally known plasticizer can be used. One kind of theplasticizer may be used alone, and two or more kinds thereof may becombinedly used.

Examples of the plasticizer include organic ester plasticizers such as amonobasic organic acid ester and a polybasic organic acid ester, organicphosphate plasticizers such as an organic phosphate plasticizer and anorganic phosphite plasticizer, and the like. Of these, organic esterplasticizers are preferred. It is preferred that the plasticizer be aliquid plasticizer.

The monobasic organic acid ester is not particularly limited andexamples thereof include a glycol ester obtained by the reaction of aglycol with a monobasic organic acid, an ester of triethylene glycol ortripropylene glycol and a monobasic organic acid, and the like. Examplesof the glycol include triethylene glycol, tetraethylene glycol,tripropylene glycol and the like. Examples of the monobasic organic acidinclude butyric acid, isobutyric acid, caproic acid, 2-ethylbutyricacid, hepthylic acid, n-octylic acid, 2-ethylhexanoic acid, n-nonylicacid, decylic acid and the like.

The polybasic organic acid ester is not particularly limited andexamples thereof include an ester compound of a polybasic organic acidand an alcohol having a linear or branched structure of 4 to 8 carbonatoms. Examples of the polybasic organic acid include adipic acid,sebacic acid, azelaic acid and the like.

The organic ester plasticizer is not particularly limited and examplesthereof include triethylene glycol di-2-ethylbutyrate, triethyleneglycol di-2-ethylhexanoate, triethylene glycol dicaprylate, triethyleneglycol di-n-octanoate, triethylene glycol di-n-heptanoate, tetraethyleneglycol di-n-heptanoate, dibutyl sebacate, dioctyl azelate, dibutylcarbitol adipate, ethylene glycol di-2-ethylbutyrate, 1,3-propyleneglycol di-2-ethylbutyrate, 1,4-butylene glycol di-2-ethylbutyrate,diethylene glycol di-2-ethylbutyrate, diethylene glycoldi-2-ethylhexanoate, dipropylene glycol di-2-ethylbutyrate, triethyleneglycol di-2-ethylpentanoate, tetraethylene glycol di-2-ethylbutyrate,diethylene glycol dicapryate, dihexyl adipate, dioctyl adipate, hexylcyclohexyl adipate, a mixture of heptyl adipate and nonyl adipate,diisononyl adipate, diisodecyl adipate, heptyl nonyl adipate, dibutylsebacate, oil-modified sebacic alkyd, a mixture of a phosphoric acidester and an adipic acid ester, and the like. Organic ester plasticizersother than these may be used.

The organic phosphate plasticizer is not particularly limited andexamples thereof include tributoxyethyl phosphate, isodecyl phenylphosphate, triisopropyl phosphate and the like.

It is preferred that the plasticizer be a diester plasticizerrepresented by the following formula (1).

In the foregoing formula (1), R1 and R2 each represent an organic groupwith 5 to 10 carbon atoms, R3 represents an ethylene group, anisopropylene group or an n-propylene group, and p represents an integerof 3 to 10. It is preferred that R1 and R2 in the foregoing formula (1)each be an organic group with 6 to 10 carbon atoms.

It is preferred that the plasticizer include at least one kind amongtriethylene glycol di-2-ethylhexanoate (3GO) and triethylene glycoldi-2-ethylbutyrate (3GH), and it is more preferred that the plasticizerinclude triethylene glycol di-2-ethylhexanoate.

The content of the plasticizer is not particularly limited. In each ofthe interlayer film, the first resin layer and the second resin layer,relative to 100 parts by weight of the thermoplastic resin, the contentof the plasticizer is preferably greater than or equal to 25 parts byweight, more preferably greater than or equal to 30 parts by weight,preferably less than or equal to 60 parts by weight, and more preferablyless than or equal to 50 parts by weight. When the content of theplasticizer is greater than or equal to the above lower limit, thepenetration resistance of laminated glass is further enhanced. When thecontent of the plasticizer is less than or equal to the above upperlimit, the transparency of the interlayer film is further enhanced.

[Organic Coloring Matter X]

The interlayer film and the first resin layer contain an organiccoloring matter X containing a transition element. It is preferred thatthe second resin layer contain an organic coloring matter X containing atransition element. One kind of the organic coloring matter X may beused alone and two or more kinds thereof may be combinedly used. Thetransition element contained in the organic coloring matter X may beconstituted only of one kind thereof and may be constituted of two ormore kinds thereof.

From the viewpoint of further heightening the visible lighttransmittance and the heat resistance or from the viewpoint of furtherheightening the visible light transmittance, the heat resistance and theheat shielding properties, it is preferred that the transition elementcontained in the organic coloring matter X be a group 4 element, a group5 element, a group 6 element, a group 7 element, a group 8 element, agroup 9 element, a group 10 element or a group 11 element, it is morepreferred that the transition element be a group 5 element or a group 11element, it is further preferred that the transition element be copperor vanadium, and it is especially preferred that the transition elementbe copper. In this case, the organic coloring matter X may contain aplurality of transition elements, may contain a group 5 element and atransition element other than the group 5 element, may contain a group11 element and a transition element other than the group 11 element, maycontain a group 5 element and a group 11 element, and may contain bothof copper and vanadium.

Examples of the organic coloring matter X include a phthalocyaninecompound containing a transition element, a naphthalocyanine compoundcontaining a transition element, an anthracyanine compound containing atransition element, an indanthrene compound containing a transitionelement, and the like.

Examples of the phthalocyanine compound include phthalocyanine and aderivative of phthalocyanine. Examples of the naphthalocyanine compoundinclude naphthalocyanine and a derivative of naphthalocyanine. Examplesof the anthracyanine compound include anthracyanine and a derivative ofanthracyanine. It is preferred that each of the phthalocyanine compoundand the derivative of phthalocyanine have a phthalocyanine skeleton. Itis preferred that each of the naphthalocyanine compound and thederivative of naphthalocyanine have a naphthalocyanine skeleton. It ispreferred that each of the anthracyanine compound and the derivative ofanthracyanine have an anthracyanine skeleton.

It is preferred that the organic coloring matter X be a phthalocyaninecompound containing a transition element, a naphthalocyanine compoundcontaining a transition element or an anthracyanine compound containinga transition element. It is more preferred that the organic coloringmatter X be a phthalocyanine compound containing a transition element ora naphthalocyanine compound containing a transition element. In thiscase, both of a phthalocyanine compound and a naphthalocyanine compoundmay be used. By the use of these preferred organic coloring matters, thevisible light transmittance, the heat resistance and the heat shieldingproperties are further heightened. The organic coloring matter X may bea phthalocyanine compound containing a transition element and may be anaphthalocyanine compound containing a transition element.

From the viewpoint of further heightening the visible lighttransmittance, the heat resistance and the heat shielding properties,the maximum absorption wavelength of the organic coloring matter X ispreferably greater than or equal to 550 nm, preferably less than orequal to 750 nm, more preferably greater than or equal to 600 nm, morepreferably less than or equal to 740 nm, further preferably greater thanor equal to 650 nm and less than or equal to 730 nm, especiallypreferably greater than or equal to 700 nm, and especially preferablyless than or equal to 720 nm.

The content of the organic coloring matter X in each of the interlayerfilm, the first resin layer and the second resin layer is notparticularly limited. In 100% by weight of each of the interlayer film,the first resin layer and the second resin layer, the content of theorganic coloring matter X is preferably greater than or equal to0.000001% by weight, more preferably greater than or equal to 0.00001%by weight, further preferably greater than or equal to 0.001% by weight,especially preferably greater than or equal to 0.002% by weight,preferably less than or equal to 0.05% by weight, more preferably lessthan or equal to 0.03% by weight, and further preferably less than orequal to 0.01% by weight. The content of the organic coloring matter Xin each of the interlayer film, the first resin layer and the secondresin layer is preferably greater than or equal to 0.0005 parts byweight, more preferably greater than or equal to 0.001 parts by weight,further preferably greater than or equal to 0.0014 parts by weight,especially preferably greater than or equal to 0.002 parts by weight,preferably less than or equal to 0.03 parts by weight, more preferablyless than or equal to 0.02 parts by weight, and further preferably lessthan or equal to 0.01 parts by weight. When the content of the organiccoloring matter X in the interlayer film is greater than or equal to theabove lower limit and less than or equal to the above upper limit,effects of the above-mentioned 1), 2) and 3) are further satisfactorilyobtained. Moreover, with regard to the color tone, it is possible toattain a color tone which is preferable as that of laminated glass.

[Metal Element Y]

The interlayer film and the first resin layer contain a metal element Y.It is preferred that the second resin layer contain a metal element Y.In the case where the interlayer film, the first resin layer or thesecond resin layer contains metal oxide particles, the metal element Yis also different from a metal element contained in the metal oxideparticles having heat shielding performance. This means that the metalelement Y does not constitute a part of the metal oxide particle havingheat shielding performance. In the interlayer film according to thepresent invention, the metal element Y is not contained as a part of themetal oxide particle having heat shielding performance. Furthermore, themetal element Y is different from the transition element. Accordingly,the metal element Y is different from a transition element contained inan organic coloring matter X. One kind of the metal element Y may beused alone and two or more kinds thereof may be combinedly used.

It is preferred that the metal element Y be added as an alkali metalsalt or an alkaline earth metal salt (hereinafter, sometimes describedas a metal salt M) to be contained in the interlayer film. In this case,both of the alkali metal salt and the alkaline earth metal salt may beused. By the use of the metal salt M, controlling the adhesivity betweena laminated glass member and the interlayer film or the adhesivitybetween respective layers in the interlayer film is facilitated. Onekind of the metal salt M may be used alone and two or more kinds thereofmay be combinedly used. In this connection, examples of an alkalineearth metal include magnesium and beryllium.

It is preferred that each of the interlayer film and the metal salt Mcontain Li, Na, K, Rb, Cs, Mg, Ca, Sr or Ba. It is preferred that eachof the interlayer film and the metal salt M contain K (potassium) or Mg(magnesium). In this case, both of K and Mg may be contained. It ispreferred that each of the interlayer film and the metal salt M containK, and it is also preferred that each of the interlayer film and themetal salt M contain Mg.

Moreover, it is preferred that the metal salt M be an alkali metal saltof an organic acid with 1 to 16 carbon atoms or an alkaline earth metalsalt of an organic acid with 1 to 16 carbon atoms, and it is morepreferred that the metal salt M be a magnesium salt of a carboxylic acidwith 1 to 16 carbon atoms or a potassium salt of a carboxylic acid with1 to 16 carbon atoms. It is further preferred that the metal salt M bean alkali metal salt of an organic acid with 2 to 16 carbon atoms or analkaline earth metal salt of an organic acid with 2 to 16 carbon atoms,and it is especially preferred that the metal salt M be a magnesium saltof a carboxylic acid with 2 to 16 carbon atoms or a potassium salt of acarboxylic acid with 2 to 16 carbon atoms.

Although the magnesium salt of a carboxylic acid with 1 to 16 carbonatoms and the potassium salt of a carboxylic acid with 1 to 16 carbonatoms are not particularly limited, examples thereof include magnesiumacetate, potassium acetate, magnesium propionate, potassium propionate,magnesium 2-ethylbutyrate, potassium 2-ethylbutanoate, magnesium2-ethylhexanoate, potassium 2-ethylhexanoate, and the like. It ispreferred that the magnesium salt of a carboxylic acid with 1 to 16carbon atoms be a magnesium salt of a carboxylic acid with 2 to 10carbon atoms, it is more preferred that the magnesium salt be amagnesium salt of a carboxylic acid with 2 to 8 carbon atoms, and it isfurther preferred that the magnesium salt be a magnesium salt of acarboxylic acid with 2 to 6 carbon atoms. It is preferred that thepotassium salt of a carboxylic acid with 1 to 16 carbon atoms be apotassium salt of a carboxylic acid with 2 to 10 carbon atoms, it ismore preferred that the potassium salt be a potassium salt of acarboxylic acid with 2 to 8 carbon atoms, and it is further preferredthat the potassium salt be a potassium salt of a carboxylic acid with 2to 6 carbon atoms.

From the viewpoint of further effectively obtaining the effects of theabove-mentioned 1), 2) and 3), in each of the interlayer film, the firstresin layer and the second resin layer, it is preferred that the metalelement Y be added as potassium acetate, magnesium acetate or magnesium2-ethylbutyrate to be contained. Accordingly, it is preferred that eachof the interlayer film, the first resin layer and the second resin layercontain potassium acetate, magnesium acetate or magnesium2-ethylbutyrate. It is more preferred that each of the interlayer film,the first resin layer and the second resin layer contain magnesiumacetate or magnesium 2-ethylbutyrate, only one among magnesium acetateand magnesium 2-ethylbutyrate may be used, and both of magnesium acetateand magnesium 2-ethylbutyrate may be used. Each of the interlayer film,the first resin layer and the second resin layer may contain magnesiumacetate and magnesium 2-ethylbutyrate, may contain magnesium acetate andpotassium acetate, and may contain magnesium 2-ethylbutyrate andpotassium acetate.

The content of the metal element Y in the interlayer film is preferablygreater than or equal to 5 ppm, more preferably greater than or equal to10 ppm, further preferably greater than or equal to 20 ppm, preferablyless than or equal to 300 ppm, more preferably less than or equal to 250ppm, and further preferably less than or equal to 200 ppm. In the casewhere the interlayer film contains an alkali metal as the metal element,the content of the alkali metal in the interlayer film is preferablygreater than or equal to 5 ppm, more preferably greater than or equal to10 ppm, further preferably greater than or equal to 20 ppm, preferablyless than or equal to 300 ppm, more preferably less than or equal to 250ppm, and further preferably less than or equal to 200 ppm. In the casewhere the interlayer film contains an alkaline earth metal as the metalelement, the content of the alkaline earth metal in the interlayer filmis preferably greater than or equal to 5 ppm, more preferably greaterthan or equal to 10 ppm, further preferably greater than or equal to 20ppm, preferably less than or equal to 300 ppm, more preferably less thanor equal to 250 ppm, and further preferably less than or equal to 200ppm. In the case where the interlayer film contains an alkali metal andan alkaline earth metal as the metal element, the total content of thealkali metal and the alkaline earth metal in the interlayer film ispreferably greater than or equal to 5 ppm, more preferably greater thanor equal to 10 ppm, further preferably greater than or equal to 20 ppm,preferably less than or equal to 300 ppm, more preferably less than orequal to 250 ppm, and further preferably less than or equal to 200 ppm.When the content of the metal element Y is greater than or equal to theabove lower limit and less than or equal to the above upper limit, theadhesivity between a laminated glass member and the interlayer film orthe adhesivity between respective layers in the interlayer film can befurther well controlled. Furthermore, when the content of the metalelement Y is greater than or equal to the above lower limit, the lightresistance of the interlayer film is still further enhanced, and highvisible light transmittance can be maintained over a further longerperiod of time. The content of the metal element Y in the interlayerfilm can be measured by means of a high frequency inductively coupledplasma emission spectrometer (“ICPE-9000” available from SHIMADZUCORPORATION) or the like.

From the viewpoint of further effectively obtaining the effects of theabove-mentioned 1), 2) and 3), the content of the metal element Yrelative to 1 part by weight of the organic coloring matter X ispreferably greater than or equal to 0.5 parts by weight, more preferablygreater than or equal to 1 part by weight, further preferably greaterthan or equal to 2 parts by weight, preferably less than or equal to 48parts by weight, more preferably less than or equal to 24 parts byweight, and further preferably less than or equal to 16 parts by weight.When the content of the metal element Y relative to 100 parts by weightof the organic coloring matter X is greater than or equal to the abovelower limit and less than or equal to the above upper limit, theadhesivity between a laminated glass member and the interlayer film orthe adhesivity between respective layers in the interlayer film can befurther well controlled, the light resistance of the interlayer film isstill further enhanced, and high visible light transmittance can bemaintained over a further longer period of time.

[Ultraviolet Ray Shielding Agent]

It is preferred that the interlayer film contain an ultraviolet rayshielding agent. It is preferred that the first resin layer contain anultraviolet ray shielding agent. It is preferred that the second resinlayer contain an ultraviolet ray shielding agent. By the use of anultraviolet ray shielding agent, even when the interlayer film and thelaminated glass are used for a long period of time, the visible lighttransmittance becomes further difficult to be lowered. One kind of theultraviolet ray shielding agent may be used alone and two or more kindsthereof may be combinedly used.

Examples of the ultraviolet ray shielding agent include an ultravioletray absorber. It is preferred that the ultraviolet ray shielding agentbe an ultraviolet ray absorber.

Examples of the ultraviolet ray shielding agent include a metal-basedultraviolet ray shielding agent, a metal oxide-based ultraviolet rayshielding agent, a benzotriazole ultraviolet ray shielding agent, abenzophenone ultraviolet ray shielding agent, a triazine ultraviolet rayshielding agent, a malonic acid ester ultraviolet ray shielding agent,an oxanilide ultraviolet ray shielding agent, a benzoate ultraviolet rayshielding agent, and the like. In this connection, the benzotriazoleultraviolet ray shielding agent is an ultraviolet ray shielding agenthaving a benzotriazole structure, the benzophenone ultraviolet rayshielding agent is an ultraviolet ray shielding agent having abenzophenone structure, the triazine ultraviolet ray shielding agent isan ultraviolet ray shielding agent having a triazine structure, themalonic acid ester ultraviolet ray shielding agent is an ultraviolet rayshielding agent having a malonic acid ester structure, the oxanilideultraviolet ray shielding agent is an ultraviolet ray shielding agenthaving an oxanilide structure, and the benzoate ultraviolet rayshielding agent is an ultraviolet ray shielding agent having a benzoatestructure.

Examples of the metal-based ultraviolet ray shielding agent includeplatinum particles, particles in which the surface of platinum particlesis coated with silica, palladium particles, particles in which thesurface of palladium particles is coated with silica, and the like. Itis preferred that the ultraviolet ray shielding agent not be heatshielding particles.

The ultraviolet ray shielding agent is preferably a benzotriazoleultraviolet ray shielding agent, a benzophenone ultraviolet rayshielding agent, a triazine ultraviolet ray shielding agent or abenzoate ultraviolet ray shielding agent, more preferably abenzotriazole ultraviolet ray shielding agent or a benzophenoneultraviolet ray shielding agent, and further preferably a benzotriazoleultraviolet ray shielding agent.

Examples of the metal oxide-based ultraviolet ray shielding agentinclude zinc oxide, titanium oxide, cerium oxide and the like.Furthermore, in the metal oxide-based ultraviolet ray shielding agent,the surface thereof may be coated. Examples of a coating material forthe surface of the metal oxide-based ultraviolet ray shielding agentinclude an insulating metal oxide, a hydrolyzable organosiliconcompound, a silicone compound and the like.

Examples of the insulating metal oxide include silica, alumina, zirconiaand the like. For example, the insulating metal oxide has a band-gapenergy greater than or equal to 5.0 eV.

Examples of the benzotriazole ultraviolet ray shielding agent includebenzotriazole ultraviolet ray shielding agents such as2-(2′-hydroxy-5′-methylphenyl)benzotriazole (“Tinuvin P” available fromBASF Japan Ltd.), 2-(2′-hydroxy-3′,5′-di-t-butylphenyl)benzotriazole(“Tinuvin 320” available from BASF Japan Ltd.),2-(2′-hydroxy-3′-t-butyl-5-methylphenyl)-5-chlorobenzotriazole (“Tinuvin326” available from BASF Japan Ltd.) and2-(2′-hydroxy-3′,5′-di-amylphenyl)benzotriazole (“Tinuvin 328” availablefrom BASF Japan Ltd.). It is preferred that the ultraviolet rayshielding agent be a benzotriazole ultraviolet ray shielding agentcontaining halogen atoms, and it is more preferred that the ultravioletray shielding agent be a benzotriazole ultraviolet ray shielding agentcontaining chlorine atoms, since those are excellent in ultraviolet rayabsorbing performance.

Examples of the benzophenone ultraviolet ray shielding agent includeoctabenzone (“Chimassorb 81” available from BASF Japan Ltd.) and thelike.

Examples of the triazine ultraviolet ray shielding agent include“LA-F70” available from ADEKA CORPORATION,2-(4,6-diphenyl-1,3,5-triazine-2-yl)-5-[(hexyl)oxy]-phenol (“Tinuvin1577FF” available from BASF Japan Ltd.) and the like.

Examples of the malonic acid ester ultraviolet ray shielding agentinclude dimethyl 2-(p-methoxybenzylidene)malonate,tetraethyl-2,2-(1,4-phenylenedimethylidene)bismalonate,2-(p-methoxybenzylidene)-bis(1,2,2,6,6-pentamethyl-4-piperidinyl)malonateand the like.

Examples of a commercial product of the malonic acid ester ultravioletray shielding agent include Hostavin B-CAP, Hostavin PR-25 and HostavinPR-31 (any of these is available from Clariant Japan K.K.).

Examples of the anilide oxalate ultraviolet ray shielding agent includea kind of oxalic acid diamide having a substituted aryl group and thelike on the nitrogen atom such asN-(2-ethylphenyl)-N′-(2-ethoxy-5-t-butylphenyl)oxalic acid diamide,N-(2-ethylphenyl)-N′-(2-ethoxy-phenyl)oxalic acid diamide and2-ethyl-2′-ethoxy-oxyanilide (“Sanduvor VSU” available from ClariantJapan K.K.).

Examples of the benzoate ultraviolet ray shielding agent include2,4-di-tert-butylphenyl-3,5-di-tert-butyl-4-hydroxybenzoate (“Tinuvin120” available from BASF Japan Ltd.) and the like.

From the viewpoint of further suppressing the lowering in visible lighttransmittance after the lapse of a certain period of time, the contentof the ultraviolet ray shielding agent is preferably greater than orequal to 0.1% by weight, more preferably greater than or equal to 0.2%by weight, further preferably greater than or equal to 0.3% by weight,especially preferably greater than or equal to 0.5% by weight,preferably less than or equal to 2.5% by weight, more preferably lessthan or equal to 2% by weight, further preferably less than or equal to1% by weight, and especially preferably less than or equal to 0.8% byweight, in 100% by weight of each of the interlayer film, the firstresin layer and the second resin layer. In particular, by allowing thecontent of the ultraviolet ray shielding agent to be greater than orequal to 0.2% by weight, the lowering in visible light transmittance ofthe interlayer film and laminated glass after the lapse of a certainperiod of time can be significantly suppressed.

[Oxidation Inhibitor]

It is preferred that the interlayer film contain an oxidation inhibitor.It is preferred that the first resin layer contain an oxidationinhibitor. It is preferred that the second resin layer contain anoxidation inhibitor. One kind of the oxidation inhibitor may be usedalone and two or more kinds thereof may be combinedly used.

Examples of the oxidation inhibitor include a phenol oxidationinhibitor, a sulfur oxidation inhibitor, a phosphorus oxidationinhibitor and the like. The phenol oxidation inhibitor is an oxidationinhibitor having a phenol skeleton. The sulfur oxidation inhibitor is anoxidation inhibitor containing a sulfur atom. The phosphorus oxidationinhibitor is an oxidation inhibitor containing a phosphorus atom.

It is preferred that the oxidation inhibitor be a phenol oxidationinhibitor or a phosphorus oxidation inhibitor.

Examples of the phenol oxidation inhibitor include2,6-di-t-butyl-p-cresol (BHT), butylated hydroxyanisole (BHA),2,6-di-t-butyl-4-ethylphenol,stearyl-β-(3,5-di-t-butyl-4-hydroxyphenyl)propionate,2,2′-methylenebis-(4-methyl-6-butylphenol),2,2′-methylenebis-(4-ethyl-6-t-butylphenol),4,4′-butylidene-bis-(3-methyl-6-t-butylphenol),1,1,3-tris-(2-methyl-hydroxy-5-t-butylphenyl)butane,tetrakis[methylene-3-(3′,5′-butyl-4-hydroxyphenyl)propionate]methane,1,3,3-tris-(2-methyl-4-hydroxy-5-t-butylphenol)butane,1,3,5-trimethyl-2,4,6-tris(3,5-di-t-butyl-4-hydroxybenzyl)benzene,bis(3,3′-t-butylphenol)butyric acid glycol ester,bis(3-t-butyl-4-hydroxy-5-methylbenzenepropanoicacid)ethylenebis(oxyethylene), and the like. One kind or two or morekinds among these oxidation inhibitors are suitably used.

Examples of the phosphorus oxidation inhibitor include tridecylphosphite, tris(tridecyl) phosphite, triphenyl phosphite, trinonylphenylphosphite, bis(tridecyl)pentaerithritol diphosphite,bis(decyl)pentaerithritol diphosphite,tris(2,4-di-t-butylphenyl)phosphite,bis(2,4-di-t-butyl-6-methylphenyl)ethyl ester phosphorous acid,tris(2,4-di-t-butylphenyl)phosphite,2,2′-methylenebis(4,6-di-t-butyl-1-phenyloxy) (2-ethylhexyloxy)phosphorus, and the like. One kind or two or more kinds among theseoxidation inhibitors are suitably used.

Examples of a commercial product of the oxidation inhibitor include“Smilizer BHT” available from Sumitomo Chemical Co., Ltd., “Irganox1010” available from Nihon Ciba-Geigy K.K., and the like.

In order to maintain high visible light transmittance of the interlayerfilm and laminated glass over a long period of time, it is preferredthat the content of the oxidation inhibitor be greater than or equal to0.1% by weight in 100% by weight of each of the interlayer film, thefirst resin layer and the second resin layer. Moreover, since an effectcommensurate with the addition of an oxidation inhibitor is notattained, it is preferred that the content of the oxidation inhibitor beless than or equal to 2% by weight in 100% by weight of each of theinterlayer film, the first resin layer and the second resin layer.

From the viewpoint of further heightening the visible lighttransmittance of the interlayer film and laminated glass and the visiblelight transmittance of the interlayer film and laminated glass after thelapse of a certain period of time, the content of the oxidationinhibitor is preferably greater than or equal to 0.1% by weight in 100%by weight of each of the interlayer film, the first resin layer and thesecond resin layer. Moreover, in order to suppress the discoloration ofthe peripheral part due to the influence of the oxidation inhibitor, thecontent of the oxidation inhibitor is preferably less than or equal to2% by weight, and more preferably less than or equal to 1.8% by weight,in 100% by weight of each of the interlayer film, the first resin layerand the second resin layer.

[Heat Shielding Particles]

It is preferred that the interlayer film contain heat shieldingparticles. It is preferred that the first resin layer contain the heatshielding particles. It is preferred that the second resin layer containthe heat shielding particles. By the use of the heat shieldingparticles, infrared rays (heat rays) can be effectively cut off. Onekind of the heat shielding particles may be used alone and two or morekinds thereof may be combinedly used.

From the viewpoint of further heightening the heat shielding propertiesof laminated glass, it is more preferred that the heat shieldingparticles be metal oxide particles. It is preferred that the heatshielding particle be a particle (a metal oxide particle) formed from anoxide of a metal.

The energy amount of an infrared ray with a wavelength greater than orequal to 780 nm which is longer than that of visible light is small ascompared with an ultraviolet ray. However, the thermal action ofinfrared rays is large, and when infrared rays are absorbed into asubstance, heat is released from the substance. As such, infrared raysare generally called heat rays. By the use of the heat shieldingparticles, infrared rays (heat rays) can be effectively cut off. In thisconnection, the heat shielding particle means a particle capable ofabsorbing infrared rays.

Specific examples of the heat shielding particles include metal oxideparticles such as aluminum-doped tin oxide particles, indium-doped tinoxide particles, antimony-doped tin oxide particles (ATO particles),gallium-doped zinc oxide particles (GZO particles), indium-doped zincoxide particles (IZO particles), aluminum-doped zinc oxide particles(AZO particles), niobium-doped titanium oxide particles, sodium-dopedtungsten oxide particles, cesium-doped tungsten oxide particles,thallium-doped tungsten oxide particles, rubidium-doped tungsten oxideparticles, tin-doped indium oxide particles (ITO particles), tin-dopedzinc oxide particles and silicon-doped zinc oxide particles, lanthanumhexaboride (LaB₆) particles, and the like. Heat shielding particlesother than these may be used. Of these, since the heat ray shieldingfunction is high, preferred are metal oxide particles, more preferredare ATO particles, GZO particles, IZO particles, ITO particles ortungsten oxide particles, and especially preferred are ITO particles ortungsten oxide particles. In particular, since the heat ray shieldingfunction is high and the particles are readily available, preferred aretin-doped indium oxide particles (ITO particles), and also preferred aretungsten oxide particles.

The tungsten oxide particles are generally represented by the followingformula (X1) or the following formula (X2). In the interlayer film, thetungsten oxide particles represented by the following formula (X1) orthe following formula (X2) are suitably used.

W_(y)O_(z)  Formula (X1)

In the foregoing formula (X1), W represents tungsten, O representsoxygen, and y and z satisfy the equation of 2.0<z/y<3.0.

M_(x)W_(y)O_(z)  Formula (X2)

In the foregoing formula (X2), M represents at least one kind of theelement selected from the group consisting of H, He, an alkali metal, analkaline earth metal, a rare earth element, Mg, Zr, Cr, Mn, Fe, Ru, Co,Rh, Ir, Ni, Pd, Pt, Cu, Ag, Au, Zn, Cd, Al, Ga, In, Tl, Si, Ge, Sn, Pb,Sb, B, F, P, S, Se, Br, Te, Ti, Nb, V, Mo, Ta and Re, W representstungsten, O represents oxygen, and x, y and z satisfy the equations of0.001≤x/y≤1 and 2.0<z/y≤3.0.

From the viewpoint of further heightening the heat shielding propertiesof the interlayer film and laminated glass, it is preferred that thetungsten oxide particles be metal-doped tungsten oxide particles.Examples of the “tungsten oxide particles” include metal-doped tungstenoxide particles. Specifically, examples of the metal-doped tungstenoxide particles include sodium-doped tungsten oxide particles,cesium-doped tungsten oxide particles, thallium-doped tungsten oxideparticles, rubidium-doped tungsten oxide particles, and the like.

From the viewpoint of further heightening the heat shielding propertiesof the interlayer film and laminated glass, cesium-doped tungsten oxideparticles are especially preferred. From the viewpoint of still furtherheightening the heat shielding properties of the interlayer film andlaminated glass, it is preferred that the cesium-doped tungsten oxideparticles be tungsten oxide particles represented by the formula:Cs_(0.33)WO₃.

The average particle diameter of the heat shielding particles ispreferably greater than or equal to 0.01 μm, more preferably greaterthan or equal to 0.02 μm, preferably less than or equal to 0.1 μm, andmore preferably less than or equal to 0.05 μm. When the average particlediameter is greater than or equal to the above lower limit, the heat rayshielding properties are sufficiently heightened. When the averageparticle diameter is less than or equal to the above upper limit, thedispersibility of heat shielding particles is enhanced.

The “average particle diameter” refers to the volume average particlediameter. The average particle diameter can be measured using a particlesize distribution measuring apparatus (“UPA-EX150” available fromNIKKISO CO., LTD.), or the like.

In 100% by weight of each of the interlayer film, the first resin layerand the second resin layer, the content of the heat shielding particlesis preferably greater than or equal to 0.01% by weight, more preferablygreater than or equal to 0.1% by weight, further preferably greater thanor equal to 1% by weight, especially preferably greater than or equal to1.5% by weight, preferably less than or equal to 6% by weight, morepreferably less than or equal to 5.5% by weight, further preferably lessthan or equal to 4% by weight, especially preferably less than or equalto 3.5% by weight, and most preferably less than or equal to 3% byweight. When the content of the heat shielding particles is greater thanor equal to the above lower limit and less than or equal to the aboveupper limit, the heat shielding properties are sufficiently heightenedand the visible light transmittance is sufficiently heightened.

It is preferred that each of the interlayer film, the first resin layerand the second resin layer contain the heat shielding particles in aproportion greater than or equal to 0.1 g/m² and less than or equal to12 g/m². In the case where the proportion of the heat shieldingparticles lies within the above-mentioned range, the heat shieldingproperties are sufficiently heightened and the visible lighttransmittance is sufficiently heightened. The proportion of the heatshielding particles is preferably greater than or equal to 0.5 g/m²,more preferably greater than or equal to 0.8 g/m², further preferablygreater than or equal to 1.5 g/m², especially preferably greater than orequal to 3 g/m², preferably less than or equal to 11 g/m², morepreferably less than or equal to 10 g/m², further preferably less thanor equal to 9 g/m², and especially preferably less than or equal to 7g/m². When the proportion is greater than or equal to the above lowerlimit, the heat shielding properties are further heightened. When theproportion is less than or equal to the above upper limit, the visiblelight transmittance is further heightened.

[Other Ingredients]

Each of the interlayer film, the first resin layer and the second resinlayer may contain additives such as a light stabilizer, a flameretardant, an antistatic agent, a pigment, a dye, an adhesive forceregulating agent, a moisture-resistance improving agent, a fluorescentbrightening agent and an infrared ray absorber, as necessary. One kindof these additives may be used alone, and two or more kinds thereof maybe combinedly used.

(Infrared Ray Reflection Layer)

The infrared ray reflection layer reflects infrared rays. The infraredray reflection layer is not particularly limited as long as the layerhas infrared ray reflecting performance. Examples of the infrared rayreflection layer include a resin film with metal foil, a multilayerlaminated film in which a metal layer and a dielectric layer are formedon a resin layer, a film containing graphite, a multilayer resin film, aliquid crystal film, and the like. These films have infrared rayreflecting performance.

The infrared ray reflection layer reflects infrared rays. The infraredray reflection layer is not particularly limited as long as the layerhas infrared ray reflecting performance. It is preferred that theinfrared ray reflection layer has a characteristic having the infraredray transmittance of 50% or less at one or more wavelength within therange of 780 to 2100 nm., since the layer is excellent in infrared rayreflecting performance. In at least one wavelength within the range of780 to 2100 nm, the infrared ray transmittance is more preferably lessthan or equal to 30%. In this connection, the infrared ray transmittanceof an infrared ray reflection layer used in the example described belowsatisfies the above-mentioned preferred condition. Moreover, it ispreferred that the infrared ray reflection layer be capable ofreflecting light rays in the range of 800 to 1300 nm.

Examples of the infrared ray reflection layer include a resin film withmetal foil, a multilayer laminated film in which a metal layer and adielectric layer are formed on a resin layer, a film containinggraphite, a multilayer resin film, a liquid crystal film, and the like.These films have infrared ray reflecting performance.

The resin film with metal foil is provided with a resin film and metalfoil layered on the outer surface of the resin film. Examples of thematerial for the resin film include a polyethylene terephthalate resin,a polyvinyl acetal resin, an ethylene-vinyl acetate copolymer resin, anethylene-acryl copolymer resin, a polyurethane resin, a polyvinylalcohol resin, a polyolefin resin, a polyvinyl chloride resin, apolyimide resin and the like. Examples of the material for the metalfoil include aluminum, copper, silver, gold, palladium, an alloycontaining these metals, and the like.

The resin film with metal foil is provided with a resin film and metalfoil layered on the outer surface of the resin film. Examples of thematerial for the resin film include a polyethylene terephthalate resin,a polyvinyl acetal resin, an ethylene-vinyl acetate copolymer resin, anethylene-acryl copolymer resin, a polyurethane resin, a polyvinylalcohol resin, a polyolefin resin, a polyvinyl chloride resin, apolyimide resin and the like. Examples of the material for the metalfoil include aluminum, copper, silver, gold, palladium, an alloycontaining these metals, and the like.

The multilayer laminated film in which a metal layer and a dielectriclayer are formed on a resin layer is a multilayer laminated film inwhich metal layers and dielectric layers are alternately layered in anarbitrary number of layers on a resin layer (resin film).

Examples of the material for the resin layer (resin film) in themultilayer laminated film include the same material as the material forthe resin film in the resin film with metal foil. Examples of thematerial for the resin layer (resin film) in the multilayer laminatedfilm include polyethylene, polypropylene, polylactic acid,poly(4-methylpentene-1), polyvinylidene fluoride, cyclic polyolefin,polymethyl methacrylate, polyvinyl chloride, polyvinyl alcohol, apolyamide such as nylon 6, 11, 12 and 66, polystyrene, polycarbonate,polyester, polyphenylene sulfide, polyetherimide and the like. Examplesof the material for the metal layer in the multilayer laminated filminclude the same material as the material for the metal foil in theresin film with metal foil. On both sides or on one side of the metallayer, a coat layer of a metal or a mixed oxide may be provided.Examples of the material for the coat layer include ZnO, Al₂O₃, Ga₂O₃,InO₃, MgO, Ti, NiCr, Cu and the like.

Examples of the material for the dielectric layer in the multilayerlaminated film include indium oxide and the like.

The multilayer resin film is a laminated film in which plural resinfilms are layered. Examples of the material for the multilayer resinfilm include the same material as the material for the resin layer(resin film) in the multilayer laminated film. The number of laminationsof resin films in the multilayer resin film is greater than or equal to2, may be greater than or equal to 3, and may be greater than or equalto 5. The number of laminations of resin films in the multilayer resinfilm may be less than or equal to 1000, may be less than or equal to100, and may be less than or equal to 50.

The multilayer resin film may be a multilayer resin film in which two ormore kinds of thermoplastic resin layers having a different opticalproperty (refractive index) are alternately or randomly layered in anarbitrary number of layers. Such a multilayer resin film is constitutedso that desired infrared ray reflecting performance is attained. Forexample, the multilayer resin film is prepared by alternately layeringplural resin layers X and plural resin layers Y having a refractiveindex higher than the resin layer X, and respective resin layers X maybe different from one another in thickness and respective resin layers Ymay also be different from one another in thickness. Since themultilayer resin film is prepared by alternately or randomly layeringtwo or more kinds of thermoplastic resin layers having a differentoptical property (refractive index) in an arbitrary number of layers,there is a problem that a reflection spectrum of the incident light in adirection inclined from the normal line direction of the surface of themultilayer resin film is shifted to the short wavelength side ascompared with a reflection spectrum of the incident light in the normalline direction of the surface of the multilayer resin film. This meansthat a reflection spectrum of the incident light in a direction inclinedfrom the normal line direction is shifted to the visible range even inthe case where a reflection spectrum of the incident light in the normalline direction of the surface of the multilayer resin film does notexist in the visible range. In the case where the reflection spectrum isshifted to the visible range, it follows that an observer positioned ina direction inclined from the normal line direction of the surface ofthe multilayer resin film visually recognizes reflected light whichgives a feeling of discomfort. However, in the case where the interlayerfilm for laminated glass according to the present invention is layeredon the multilayer resin film, excellent actions and effects such thatreflected light which gives a feeling of discomfort is alleviated areexerted and it is possible to obtain laminated glass which issatisfactory in hue. It is preferred that the multilayer resin filmcontain polyethylene terephthalate or polyethylene naphthalate.

Examples of the liquid crystal film include a film prepared by layeringcholesteric liquid crystal layers which reflect light with an arbitrarywavelength in an arbitrary number of layers. Such a liquid crystal filmis constituted so that desired infrared ray reflecting performance isattained.

It is preferred that the infrared ray transmittance in the wavelengthrange of 780 to 2100 nm of the first resin layer be higher than theinfrared ray transmittance in the wavelength range of 780 to 2100 nm ofthe second resin layer. Considering from a different point of view, itis preferred that the infrared ray absorptance of the first resin layerbe lower than the infrared ray absorptance of the second resin layer.

Laminated glass prepared with an interlayer film has hitherto beensometimes low in heat shielding properties. Furthermore, with regard tothe conventional laminated glass, there is a problem that achieving bothhigh heat shielding properties and high visible light transmittance(Visible Transmittance) at the same time is difficult.

In contrast, in the case where the multilayer interlayer film isprovided with the infrared ray reflection layer, and furthermore, firstand second resin layers are arranged on both sides of the infrared rayreflection layer and the infrared ray transmittance of the first resinlayer is higher than the infrared ray transmittance of the second resinlayer, it is possible to effectively heighten the heat shieldingproperties of laminated glass prepared with the multilayer interlayerfilm. Furthermore, it is possible to effectively heighten the visiblelight transmittance of laminated glass prepared with the multilayerinterlayer film. In such laminated glass prepared with the multilayerinterlayer film, it is possible to heighten the heat shieldingproperties, and furthermore, it is possible to obtain the laminatedglass which is high in visible light transmittance.

In the case where the infrared ray transmittance in the wavelength rangeof 780 to 2100 nm of the first resin layer is higher than the infraredray transmittance in the wavelength range of 780 to 2100 nm of thesecond resin layer, the first resin layer transmits a relatively largequantity of infrared rays. As such, most of the infrared raystransmitted through the first resin layer reach the infrared rayreflection layer. Since the infrared ray reflection layer reflectsinfrared rays, infrared rays which have reached the infrared rayreflection layer are reflected by the infrared ray reflection layer.Moreover, because the infrared ray transmittance of the first resinlayer is high, most of the infrared rays reflected by the infrared rayreflection layer are transmitted through the first resin layer. As aresult, a rise in the temperature of a multilayer interlayer film at thetime when infrared rays are made incident into the multilayer interlayerfilm can be suppressed. As such, the heat shielding properties of themultilayer interlayer film are heightened, and furthermore, high visiblelight transmittance can be maintained over a long period of time sincethe film is excellent in light resistance. Moreover, by mountinglaminated glass prepared with the multilayer interlayer film on anopening part of a building or a vehicle, a rise in the temperature of aninner space of a building or a vehicle can be effectively suppressed.

On the other hand, if the first resin layer and the infrared rayreflection layer transmit a part of infrared rays at all, thetransmitted infrared rays reach the second resin layer. In the casewhere the infrared ray transmittance in the wavelength range of 780 to2100 nm of the first resin layer is higher than the infrared raytransmittance in the wavelength range of 780 to 2100 nm of the secondresin layer, the second resin layer effectively cuts off thetransmission of infrared rays since the infrared ray transmittance ofthe second resin layer is relatively low. As such, the quantity of heatrays passing through the whole multilayer interlayer film can bereduced. This also enables the heat shielding properties of themultilayer interlayer film to be heightened, and by mounting laminatedglass prepared with the multilayer interlayer film on an opening part ofa building or a vehicle, a rise in the temperature of an inner space ofa building or a vehicle can be effectively suppressed.

Moreover, as a result of allowing the quantity of infrared rays whichreach the second resin layer to be reduced, the deterioration of thesecond resin layer can be suppressed and the light resistance of thewhole multilayer interlayer film is enhanced. As such, high visiblelight transmittance can be maintained over a long period of time.Furthermore, in the case where the second resin layer contains a heatshielding compound such as heat shielding particles, the deteriorationof the heat shielding compound can also be suppressed and high heatshielding properties can be maintained over a long period of time.

In the case where the infrared ray transmittance in the wavelength rangeof 780 to 2100 nm of the first resin layer is higher than the infraredray transmittance in the wavelength range of 780 to 2100 nm of thesecond resin layer, it is preferred that the first resin layer and thesecond resin layer be different from each other in composition. In thisconnection, even when the first resin layer and the second resin layerare the same as each other in composition, by making the thickness ofthe first resin layer thinner than the thickness of the second resinlayer, it is possible to make the infrared ray transmittance in thewavelength range of 780 to 2100 nm of the first resin layer higher thanthe infrared ray transmittance in the wavelength range of 780 to 2100 nmof the second resin layer.

(Interlayer Film for Laminated Glass and Multilayer Interlayer Film forLaminated Glass)

The thickness of the interlayer film according to the present inventionis not particularly limited. From the viewpoint of the practical aspectand the viewpoint of sufficiently heightening the heat shieldingproperties, the thickness of the interlayer film is preferably greaterthan or equal to 0.1 mm, more preferably greater than or equal to 0.25mm, preferably less than or equal to 3 mm, and more preferably less thanor equal to 1.5 mm. When the thickness of the interlayer film is greaterthan or equal to the above lower limit, the penetration resistance oflaminated glass is enhanced.

The thickness of the multilayer interlayer film according to the presentinvention is not particularly limited. From the viewpoint of thepractical aspect and the viewpoint of sufficiently heightening the heatshielding properties, the thickness of the multilayer interlayer film ispreferably greater than or equal to 0.1 mm, more preferably greater thanor equal to 0.25 mm, preferably less than or equal to 3 mm, and morepreferably less than or equal to 1.5 mm. When the thickness of themultilayer interlayer film is greater than or equal to the above lowerlimit, the penetration resistance of laminated glass is enhanced.

The production methods of the interlayer film according to the presentinvention and the multilayer interlayer film according to the presentinvention are not particularly limited. As the production methods of theinterlayer film and the multilayer interlayer film, conventionally knownmethods can be used. Examples thereof include a production method ofkneading an organic coloring matter X, a metal element Y, athermoplastic resin, a plasticizer and other ingredients blended asnecessary to obtain a kneaded product and forming the kneaded productinto an interlayer film or a multilayer interlayer film. A productionmethod of extrusion-molding is preferred because the method is suitablefor continuous production.

The method for kneading is not particularly limited. Examples of thismethod include a method using an extruder, a plastograph, a kneader, abanbury mixer, a calender roll, or the like. In order to obtain themultilayer interlayer film according to the present invention, a firstresin layer, an infrared ray reflection layer and a second resin layerare separately prepared, after which the first resin layer, the infraredray reflection layer and the second resin layer may be layered to obtainan interlayer film, and a first resin layer, an infrared ray reflectionlayer and a second resin layer may be layered by coextrusion to obtainan interlayer film.

It is preferred that the first resin layer and the second resin layercontain the same thermoplastic resin as each other, and it is morepreferred that the first resin layer and the second resin layer containthe same thermoplastic resin as each other and the same plasticizer aseach other, since the interlayer films or the multilayer interlayerfilms are excellent in production efficiency. The first layer and thesecond resin layer may be formed from the same resin composition as eachother.

(Laminated Glass)

FIG. 3 is a cross-sectional view schematically showing an example oflaminated glass prepared with the interlayer film for laminated glassshown in FIG. 1.

The laminated glass 31 shown in FIG. 3 is provided with a firstlaminated glass member 21, a second laminated glass member 22 and amultilayer interlayer film 11. The multilayer interlayer film 11 isarranged between the first laminated glass member 21 and the secondlaminated glass member 22 to be sandwiched.

The first laminated glass member 21 is layered on a first surface 11 aof the multilayer interlayer film 11. The second laminated glass member22 is layered on a second surface 11 b opposite to the first surface 11a of the multilayer interlayer film 11. The first laminated glass member21 is layered on an outer surface 1 a of the first resin layer 1. Thesecond laminated glass member 22 is layered on an outer surface 2 a ofthe second resin layer 2.

FIG. 4 is a cross-sectional view schematically showing an example oflaminated glass prepared with the interlayer film for laminated glassshown in FIG. 2.

The laminated glass 31A shown in FIG. 4 is provided with a firstlaminated glass member 21, a second laminated glass member 22 and aninterlayer film 11A. The interlayer film 11A is arranged between thefirst laminated glass member 21 and the second laminated glass member 22to be sandwiched.

As described above, the laminated glass according to the presentinvention is provided with the first laminated glass member, the secondlaminated glass member and the interlayer film according to the presentinvention or the multilayer interlayer film according to the presentinvention, and the interlayer film or the multilayer interlayer film isarranged between the first laminated glass member and the secondlaminated glass member. The laminated glass includes at least theinterlayer film according to the present invention.

Examples of the laminated glass member include a glass plate and a PET(polyethylene terephthalate) film and the like. As the laminated glass,laminated glass in which an interlayer film is sandwiched between aglass plate and a PET film or the like, as well as laminated glass inwhich an interlayer film is sandwiched between two glass plates, isincluded. Laminated glass is a laminate provided with a glass plate, andit is preferred that at least one glass plate be used. It is preferredthat the first laminated glass member and the second laminated glassmember be each a glass plate or a PET film and at least one among thefirst glass member and the second laminated glass member be a glassplate.

Examples of the glass plate include a sheet of inorganic glass and asheet of organic glass. Examples of the inorganic glass include floatplate glass, heat ray-absorbing plate glass, heat ray-reflecting plateglass, polished plate glass, figured glass, net-reinforced plate glass,wired plate glass, and the like. The organic glass is synthetic resinglass substituted for inorganic glass. Examples of the organic glassinclude a polycarbonate plate, a poly(meth)acrylic resin plate, and thelike. Examples of the poly(meth)acrylic resin plate include a polymethyl(meth)acrylate plate, and the like.

The thickness of the laminated glass member is preferably greater thanor equal to 1 mm, preferably less than or equal to 5 mm, and morepreferably less than or equal to 3 mm. Moreover, in the case where thelaminated glass member is a glass plate, the thickness of the glassplate is preferably greater than or equal to 1 mm, preferably less thanor equal to 5 mm, and more preferably less than or equal to 3 mm. In thecase where the laminated glass member is a PET film, the thickness ofthe PET film is preferably greater than or equal to 0.03 mm andpreferably less than or equal to 0.5 mm.

The production method of the laminated glass is not particularlylimited. For example, the interlayer film or the multilayer interlayerfilm is sandwiched between the first laminated glass member and thesecond laminated glass member and the air remaining between the firstlaminated glass member and the interlayer film or the multilayerinterlayer film and between the second laminated glass member and theinterlayer film or the multilayer interlayer film is removed by allowingthe members to pass through a pressing roll or by putting the membersinto a rubber bag and allowing the contents to be sucked under reducedpressure. Afterward, the members are preliminarily bonded together atabout 70 to 110° C. to obtain a laminate. Next, by putting the laminateinto an autoclave or by pressing the laminate, the members arepress-bonded together at about 120 to 150° C. and under a pressure of 1to 1.5 MPa. In this way, laminated glass can be obtained.

The interlayer film, the multilayer interlayer film and the laminatedglass can be used for automobiles, railway vehicles, aircraft, ships,buildings and the like. The interlayer film, the multilayer interlayerfilm and the laminated glass can also be used for applications otherthan these applications. It is preferred that the interlayer film, themultilayer interlayer film and the laminated glass be an interlayerfilm, a multilayer interlayer film and laminated glass for vehicles orfor construction, and it is more preferred that the interlayer film, themultilayer interlayer film and the laminated glass be an interlayerfilm, a multilayer interlayer film and laminated glass for vehicles. Theinterlayer film, the multilayer interlayer film and the laminated glasscan be used for a windshield, side glass, rear glass or roof glass of anautomobile and the like. The interlayer film, the multilayer interlayerfilm and the laminated glass are suitably used especially for awindshield.

(Method of Mounting Laminated Glass)

The method of mounting laminated glass prepared with the multilayerinterlayer film according to the present invention is a method ofmounting the above-described laminated glass for a building or a vehicleon an opening part between an outer space and an inner space into whichheat rays are made incident from the outer space.

Specifically, the laminated glass is mounted on the opening part so thatthe first laminated glass member is positioned at the outer space sideand the second laminated glass member is positioned at the inner spaceside. That is, the laminated glass is mounted so that an arrangementorder of the outer space/a first laminated glass member/(anotherlayer/)a first resin layer/(another layer/)an infrared ray reflectionlayer/(another layer/)a second resin layer/(another layer/)a secondlaminated glass member/the inner space is attained. Preferably, it ispreferred that an arrangement order of the outer space/a first laminatedglass member/a first resin layer/(another layer/)an infrared rayreflection layer/(another layer/) a second resin layer/a secondlaminated glass member/the inner space be attained, it is preferred thatan arrangement order of the outer space/a first laminated glassmember/(another layer/) a first resin layer/an infrared ray reflectionlayer/a second resin layer/(another layer/)a second laminated glassmember/the inner space be attained, and it is preferred that anarrangement order of the outer space/a first laminated glass member/afirst resin layer/an infrared ray reflection layer/a second resinlayer/a second laminated glass member/the inner space be attained. Inthe above-mentioned arrangement forms, the case where another member isarranged between the outer space and the first laminated glass member isincluded, and the case where another member is arranged between theinner space and the second laminated glass member is included.

In the layered structure, each of another layer mentioned above andanother member mentioned above may be present or may be absent. Sunlightcontaining heat rays is made incident into laminated glass from an outerspace, and the sunlight containing heat rays, which has passed throughthe laminated glass, is led to an inner space. In the case wherelaminated glass is mounted on an opening part as mentioned above, theouter surface of the first laminated glass member constitutes theincident face for heat rays. Moreover, heat rays are made incident intothe first resin layer earlier than the second resin layer.

Hereinafter, the present invention will be described in more detail withreference to examples. The present invention is not limited only tothese examples.

The following materials were used for an interlayer film, a first resinlayer and a second resin layer.

Thermoplastic Resin:

PVB1 (a polyvinyl butyral resin acetalized with n-butyraldehyde, theaverage polymerization degree of 1700, the content ratio of the hydroxylgroup of 30.8% by mole, the acetylation degree of 0.7% by mole, thebutyralization degree of 68.5% by mole)

PVB2 (a polyvinyl butyral resin acetalized with n-butyraldehyde, theaverage polymerization degree of 1700, the content ratio of the hydroxylgroup of 30.5% by mole, the acetylation degree of 1% by mole, thebutyralization degree of 68.5% by mole)

In this connection, the content ratio of the hydroxyl group, theacetylation degree and the butyralization degree (the acetalizationdegree) of the polyvinyl butyral resin were measured by a method inaccordance with ASTM D1396-92. In this connection, even in the cases ofbeing measured according to JIS K6728 “Testing methods for polyvinylbutyral”, numerical values similar to those obtained by a method inaccordance with ASTM D1396-92 were exhibited.

Plasticizer:

3GO (triethylene glycol di-2-ethylhexanoate)

Organic Coloring Matter X Containing Transition Element:

SG-5A1257 (a phthalocyanine compound, “BLUE SG-5A1257” available fromSUMIKA COLOR CO., LTD. which contains a copper atom as the centralmetal, the maximum absorption wavelength of 715 nm, an absorptionwavelength peak is also observed at a wavelength of 620 nm)

Ingredient Containing Metal Element Y:

Mg salt (a mixture of Mg salts containing 50% by weight of magnesiumacetate and 50% by weight of magnesium 2-ethylbutyrate)

K Salt (Potassium Acetate)

Heat Shielding Particles:

ITO (ITO particles, tin-doped indium oxide particles)

CWO (CWO particles, cesium-doped tungsten oxide (Cs_(0.33)WO₃)particles)

Ultraviolet Ray Shielding Agent:

T-326 (2-(2′-hydroxy-3′-t-butyl-5-methylphenyl)-5-chlorobenzotriazole,“Tinuvin 326” available from BASF Japan Ltd.)

Oxidation Inhibitor:

H-BHT (2,6-di-t-butyl-4-methyl-methylphenol, “H-BHT” available fromSakai Chemical Industry Co., Ltd.)

BHT (2,6-di-t-butyl-p-cresol)

The following infrared ray reflection layer was used for a multilayerinterlayer film.

Nano 80S (a multilayer film (a multilayer resin film), “Multilayer Nano80S” available from 3M Japan Limited)

In this connection, “Nano 80S” contains polyethylene terephthalate andallows the infrared ray transmittance to be less than or equal to 50% inat least one wavelength within the range of 780 to 2100 nm. Moreover,“Nano 80S” reflects light rays in the range of 800 to 1300 nm.

Moreover, the following material was used for laminated glass.

Clear (clear glass (transparent float clear glass), 30 cm inlongitudinal length by 30 cm in transversal length by 2.5 mm inthickness)

Example 1

Preparation of Interlayer Film:

With 40 parts by weight of a plasticizer (3GO), 0.0055 parts by weightof an organic coloring matter X (SG-5A1257) and a compound (an Mg salt)containing a metal element Y in an amount that the Mg content in theresulting interlayer film becomes 160 ppm were mixed to obtain aplasticizer dispersion.

To 100 parts by weight of a thermoplastic resin (PVB2), the whole amountof the plasticizer dispersion obtained, 0.8 parts by weight of anultraviolet ray shielding agent (T-326) and 0.2 parts by weight of anoxidation inhibitor (BHT) were added and thoroughly kneaded with amixing roll to obtain a composition.

The composition obtained was extruded by an extruder to obtain aninterlayer film (0.76 mm in thickness).

Preparation of Laminated Glass:

The interlayer film obtained was cut into a size of 30 cm inlongitudinal length by 30 cm in transversal length. The interlayer filmobtained (0.76 mm in thickness) was sandwiched between two sheets ofclear glass (30 cm in longitudinal length by 30 cm in transversal lengthby 2.5 mm in thickness), held in place for 30 minutes at 90° C. andpressed under vacuum with a vacuum laminator to obtain a laminate. Withregard to the laminate obtained, interlayer film portions protruded fromthe sheet of clear glass were cut away to obtain a sheet of laminatedglass.

Example 2 and Comparative Examples 1, 2

An interlayer film and a sheet of laminated glass were obtained in thesame manner as that in Example 1 except that the kind of ingredients tobe blended in the interlayer film and the blending amount thereof wereset to those listed in the following Table 1. In this connection, theCWO was added at the time of obtaining a plasticizer dispersion. Thekind and the blending amount of an ultraviolet ray shielding agent andan oxidation inhibitor are the same as those in Example 1.

Example 3

Preparation of Interlayer Film:

To 100 parts by weight of a thermoplastic resin (PVB1), 40 parts byweight of a plasticizer (3GO), 0.0028 parts by weight (the content ofthe organic coloring matter itself) of an organic coloring matter X(SG-5A1257), a compound (a mixture of Mg salts) containing a metalelement Y in an amount that the Mg content in the resulting interlayerfilm becomes 160 ppm, 0.2 parts by weight of an ultraviolet rayshielding agent (T-326) and 0.2 parts by weight of an oxidationinhibitor (H-BHT) were added and thoroughly kneaded with a mixing rollto obtain a composition.

The composition obtained was extruded by an extruder to obtain aninterlayer film (0.76 mm in thickness).

The interlayer film obtained was cut into a size of 30 cm inlongitudinal length by 30 cm in transversal length. The interlayer filmobtained (0.76 mm in thickness) was interposed between two sheets ofclear glass (2.5 mm in thickness) and fixed by means of a heat resistanttape so as not to positionally shift to obtain a laminate.

The laminate obtained was installed in a vacuum bag, and the inside ofthe vacuum bag was degassed at a degree of vacuum of 933.2 hPa and atordinary temperature (23° C.). Subsequently, the temperature in thevacuum bag was elevated to 100° C. while maintaining the degassed state,and after the temperature reached 100° C., the laminate was held for 20minutes. Afterward, the vacuum bag was allowed to spontaneously cool,and it was confirmed that the temperature was lowered to 30° C., afterwhich the pressure was released to the atmosphere.

The laminated glass preliminarily press-bonded by the above-mentionedvacuum bag method was press-bonded for 20 minutes under conditions of135° C. and a pressure of 1.2 MPa using an autoclave to obtain a sheetof laminated glass.

Examples 4, 5, 10 to 21

An interlayer film and a sheet of laminated glass were obtained in thesame manner as that in Example 3 except that the kind of ingredients tobe blended in the interlayer film and the blending amount thereof wereset to those listed in the following Table 3. In this connection, thekind and the blending amount of an ultraviolet ray shielding agent andan oxidation inhibitor are the same as those in Example 3.

Example 6

Preparation of First Resin Layer (Interlayer Film):

With 40 parts by weight of a plasticizer (3GO), 0.007 parts by weight(the content of the organic coloring matter itself) of an organiccoloring matter X (SG-5A1257) and a compound (an Mg salt) containing ametal element Y in an amount that the Mg content in the resultinginterlayer film becomes 160 ppm were mixed to obtain a plasticizerdispersion.

To 100 parts by weight of a thermoplastic resin (PVB2), the whole amountof the plasticizer dispersion obtained, 0.8 parts by weight of anultraviolet ray shielding agent (T-326) and 0.2 parts by weight of anoxidation inhibitor (BHT) were added and thoroughly kneaded with amixing roll to obtain a first composition.

The first composition obtained was extruded by an extruder to obtain afirst resin layer (0.38 mm in thickness).

Preparation of Second Resin Layer (Interlayer Film):

With 40 parts by weight of a plasticizer (3GO), 0.4 parts by weight ofheat shielding particles (ITO) and a compound (an Mg salt) containing ametal element Y in an amount that the Mg content in the resultinginterlayer film becomes 160 ppm were mixed to obtain a plasticizerdispersion.

To 100 parts by weight of a thermoplastic resin (PVB2), the whole amountof the plasticizer dispersion obtained, 0.8 parts by weight of anultraviolet ray shielding agent (T-326) and 0.2 parts by weight of anoxidation inhibitor (BHT) were added and thoroughly kneaded with amixing roll to obtain a second composition.

The composition obtained was extruded by an extruder to obtain a secondresin layer (0.38 mm in thickness).

Preparation of Multilayer Interlayer Film:

The Nano 80S (a multilayer film (a multilayer resin film), “MultilayerNano 80S” available from 3M Japan Limited) as an infrared ray reflectionlayer was prepared. The thickness was determined to be 76 μm.

The above-mentioned infrared ray reflection layer was sandwiched betweenthe first resin layer obtained and the second resin layer obtained toobtain a multilayer interlayer film.

Preparation of Laminated Glass:

The multilayer interlayer film obtained was cut into a size of 30 cm inlongitudinal length by 30 cm in transversal length. The multilayerinterlayer film obtained was sandwiched between two sheets of clearglass (30 cm in longitudinal length by 30 cm in transversal length by2.5 mm in thickness), held in place for 30 minutes at 90° C. and pressedunder vacuum with a vacuum laminator to obtain a laminate. With regardto the laminate obtained, multilayer interlayer film portions protrudedfrom the sheet of clear glass were cut away to obtain a sheet oflaminated glass.

(Examples 7 to 9, 22 to 33)

A multilayer interlayer film and a sheet of laminated glass wereobtained in the same manner as that in Example 6 except that the kind ofingredients to be blended in the first resin layer and the second resinlayer and the blending amount thereof were set to those listed in thefollowing Table 5. In this connection, the kind and the blending amountof an ultraviolet ray shielding agent and an oxidation inhibitor are thesame as those in Example 6.

(Evaluation)

(1) Measurement Method of Maximum Absorption Wavelength of OrganicColoring Matter

With 100 parts by weight of chloroform, 0.002 parts by weight (thecontent of the organic coloring matter itself) of an organic coloringmatter was mixed to obtain a chloroform solution. The chloroformsolution obtained was placed in a quartz cell for a spectrophotometerwith an optical path length of 1.0 mm. Using a self-registeringspectrophotometer (“U-4100” available from Hitachi, Ltd.), thetransmittance at 300 to 2500 nm was measured to determine the maximumabsorption wavelength. The measured values are described in the columnof the above-mentioned materials.

(2) Visible Light Transmittance of Laminated Glass (a Light Y Value,Initial A-Y (380 to 780 nm))

The laminated glass was measured for the transmittance in the wavelengthrange of 300 to 2500 nm using a spectrophotometer (“U-4100” availablefrom Hitachi, Ltd.) to calculate the visible light transmittance at 380to 780 nm in accordance with JIS R3211 (1998).

(3) Measurement of Tts (Total Solar Transmittance)

The laminated glass was measured for the transmittance and thereflectance in the wavelength range of 300 to 2500 nm using aspectrophotometer (“U-4100” available from Hitachi, Ltd.) to measure theTts in accordance with ISO 13837.

(4) Initial YI Value of Laminated Glass

The transmittance in the wavelength range of 380 to 2500 nm was measuredusing a spectrophotometer (“U4100” available from Hitachi, Ltd.) tocalculate the initial YI value (the yellowness index, the yellow index)in accordance with JIS K7373.

(5) Heat Resistance

The laminated glass was held in place for 8 weeks under a condition of100° C. using a forced convection type constant-temperature thermostaticapparatus (“DKM300” available from Yamato Scientific Co., Ltd.). Thelaminated glass obtained at the end of 8 weeks was measured for the YIvalue in the same manner as that for the above-mentioned (4) YI value oflaminated glass. The ΔYI value ((YI value after held at 100°C.)−(initial YI value)) was determined.

(6) Hue

A sheet of laminated glass having a layered structure with a stack ofglass/a first resin layer/an infrared ray reflection layer (a multilayerresin film)/a second resin layer/glass was held in place so as to beparallel to the horizontal direction. Next, the laminated glass wasvisually observed from a point A which is in the normal line directionof the glass surface of the laminated glass and is apart from the centerpart of the glass surface of the laminated glass by 50 cm. The laminatedglass was arranged so that the first resin layer side of the laminatedglass can be observed from the point A.

Next, while maintaining the distance from the center part of the glasssurface of the laminated glass to an observer constant, the observer wasallowed to move from the point A to a point in the same plane as theglass surface of the laminated glass in order to observe the laminatedglass for the hue. The hue was evaluated according to the followingcriteria.

[Criteria for Judgment in Hue]

◯◯: Ten persons observe the laminated glass for the hue, whereupon eightor more persons cannot recognize the change in hue.

◯: Ten persons observe the laminated glass for the hue, whereupon fiveto seven persons cannot recognize the change in hue.

x: The laminated glass does not satisfy the criteria for judgment of ◯◯or ◯.

In this connection, in the case where an infrared ray reflection layer(a multilayer resin film) is observed alone in the same manner, althoughthe hue cannot be observed at the point A, all ten persons can recognizethe change in hue (red color) when the persons are allowed to move fromthe point A to a point in the same plane as the glass surface of thelaminated glass in order to observe the laminated glass.

The details and the results are shown in the following Tables 1 to 6. Inthis connection, the evaluation results of Example 2 are excellent as inthe case of Example 1. Moreover, even in the case where magnesiumacetate and potassium acetate are combinedly used as the metal elements,the effects similar to those in Examples 1 to 33 are obtained.

TABLE 1 Composition of interlayer film Thermoplastic Organic Heatshielding resin Plasticizer coloring matter Ingredient containingparticles First Blending Blending Blending metal element Blending Secondlaminated amount amount amount Blending amount laminated glass Parts byParts by Parts by amount Parts by glass member Kind weight Kind weightKind weight Kind ppm Kind weight member Ex. 1 Clear PVB2 100 3GO 40SG-5A1257 0.0055 Mg salt 160 — — Clear Ex. 2 Clear PVB2 100 3GO 40SG-5A1257 0.0055 Mg salt 160 CWO 0.08 Clear Comp. Clear PVB2 100 3GO 40SG-5A1257 0.0055 — — — — Clear Ex. 1 Comp. Clear PVB2 100 3GO 40SG-5A1257 0.0055 160 CWO 0.08 Clear Ex. 2

TABLE 2 Measurement results Visible light transmittance Initial Heatresistance A-Y (%) Tts (%) YI value Δ YI value Ex. 1 72.3 75.9 −26.0 0.3Ex. 2 67.8 59.6 −24.8 3.0 Comp. 72.5 76.0 −26.3 1.4 Ex. 1 Comp. 68.961.4 −25.9 4.6 Ex. 2

TABLE 3 Composition of interlayer film Thermoplastic Organic Heatshielding resin Plasticizer coloring matter Ingredient containingparticles First Blending Blending Blending metal element Blending Secondlaminated amount amount amount Blending amount laminated glass Parts byParts by Parts by amount Parts by glass member Kind weight Kind weightKind weight Kind ppm Kind weight member Ex. 3 Clear PVB1 100 3GO 40SG-5A1257 0.0028 Mg salt 160 — — Clear Ex. 4 Clear PVB1 100 3GO 40SG-5A1257 0.0056 Mg salt 160 — — Clear Ex. 5 Clear PVB1 100 3GO 40SG-5A1257 0.0014 Mg salt 160 — — Clear Ex. 10 Clear PVB1 100 3GO 40SG-5A1257 0.0028 Mg salt 20 — — Clear Ex. 11 Clear PVB1 100 3GO 40SG-5A1257 0.0028 Mg salt 240 — — Clear Ex. 12 Clear PVB1 100 3GO 40SG-5A1257 0.0056 Mg salt 20 — — Clear Ex. 13 Clear PVB1 100 3GO 40SG-5A1257 0.0056 Mg salt 240 — — Clear Ex. 14 Clear PVB1 100 3GO 40SG-5A1257 0.0014 Mg salt 20 — — Clear Ex. 15 Clear PVB1 100 3GO 40SG-5A1257 0.0014 Mg salt 240 — — Clear Ex. 16 Clear PVB1 100 3GO 40SG-5A1257 0.0028 K salt 20 — — Clear Ex. 17 Clear PVB1 100 3GO 40SG-5A1257 0.0028 K salt 240 — — Clear Ex. 18 Clear PVB1 100 3GO 40SG-5A1257 0.0056 K salt 20 — — Clear Ex. 19 Clear PVB1 100 3GO 40SG-5A1257 0.0056 K salt 240 — — Clear Ex. 20 Clear PVB1 100 3GO 40SG-5A1257 0.0014 K salt 20 — — Clear Ex. 21 Clear PVB1 100 3GO 40SG-5A1257 0.0014 K salt 240 — — Clear

TABLE 4 Measurement results Visible light transmittance Initial Heatresistance A-Y (%) Tts (%) YI value Δ YI value Ex. 3 79.8 78.0 −13.0 0.1Ex. 4 72.2 75.8 −26.7 0.4 Ex. 5 84.1 79.3 −6.0 0.1 Ex. 10 79.4 77.8−12.7 0.5 Ex. 11 79.5 77.8 −12.5 0.3 Ex. 12 71.5 75.4 −26.1 1.0 Ex. 1371.5 75.5 −25.6 0.7 Ex. 14 83.9 79.1 −5.9 0.2 Ex. 15 83.9 79.2 −5.8 0.2Ex. 16 79.2 77.7 −12.2 −0.1 Ex. 17 79.3 77.8 −12.0 −0.1 Ex. 18 71.1 75.3−25.1 −0.1 Ex. 19 71.2 75.3 −24.9 −0.1 Ex. 20 83.8 79.1 −5.7 −0.0 Ex. 2183.9 76.2 −5.5 −0.0

TABLE 5 Composition of first resin layer Thermoplastic Organic Heatshielding resin Plasticizer coloring matter Ingredient containingparticles First Blending Blending Blending metal element Blendinglaminated amount amount amount Blending amount glass Parts by parts byParts by amount Parts by member Kind weight Kind weight Kind weight Kindppm Kind weight Ex. 6 Clear PVB2 100 3GO 40 SG-5A1257 0.007 Mg salt 160— — Ex. 7 Clear PVB2 100 3GO 40 SG-5A1257 0.010 Mg salt 320 — — Ex. 8Clear PVB2 100 3GO 40 SG-5A1257 0.004 Mg salt 320 — — Ex. 9 Clear PVB2100 3GO 40 SG-5A1257 0.006 Mg salt 320 — — Ex. 22 Clear PVB1 100 3GO 40SG-5A1257 0.0028 Mg salt 20 — — Ex. 23 Clear PVB1 100 3GO 40 SG-5A12570.0028 Mg salt 480 — — Ex. 24 Clear PVB1 100 3GO 40 SG-5A1257 0.0056 Mgsalt 20 — — Ex. 25 Clear PVB1 100 3GO 40 SG-5A1257 0.0056 Mg salt 480 —— Ex. 26 Clear PVB1 100 3GO 40 SG-5A1257 0.0014 Mg salt 20 — — Ex. 27Clear PVB1 100 3GO 40 SG-5A1257 0.0014 Mg salt 480 — — Ex. 28 Clear PVB1100 3GO 40 SG-5A1257 0.0028 K salt 20 — — Ex. 29 Clear PVB1 100 3GO 40SG-5A1257 0.0028 K salt 480 — — Ex. 30 Clear PVB1 100 3GO 40 SG-5A12570.0056 K salt 20 — — Ex. 31 Clear PVB1 100 3GO 40 SG-5A1257 0.0056 Ksalt 480 — — Ex. 32 Clear PVB1 100 3GO 40 SG-5A1257 0.0014 K salt 20 — —Ex. 33 Clear PVB1 100 3GO 40 SG-5A1257 0.0014 K salt 480 — — Compositionof second resin layer Thermoplastic Heat shielding resin PlasticizerIngredient containing particles Infrared Blending Blending metal elementBlending Second ray amount amount Blending amount laminated reflectionParts by Parts by amount Parts by glass layer Kind weight Kind weightKind ppm Kind weight member Ex. 6 Nano 80S PVB2 100 3GO 40 Mg salt 160ITO 0.4 Clear Ex. 7 Nano 80S PVB2 100 3GO 40 Mg salt 320 ITO 0.4 ClearEx. 8 Nano 80S PVB2 100 3GO 40 Mg salt 320 CWO 0.08 Clear Ex. 9 Nano 80SPVB2 100 3GO 40 Mg salt 320 CWO 0.08 Clear Ex. 22 Nano 80S PVB2 100 3GO40 Mg salt 160 ITO 0.4 Clear Ex. 23 Nano 80S PVB2 100 3GO 40 Mg salt 320ITO 0.4 Clear Ex. 24 Nano 80S PVB2 100 3GO 40 Mg salt 320 CWO 0.08 ClearEx. 25 Nano 80S PVB2 100 3GO 40 Mg salt 320 CWO 0.08 Clear Ex. 26 Nano80S PVB2 100 3GO 40 Mg salt 320 CWO 0.08 Clear Ex. 27 Nano 80S PVB2 1003GO 40 Mg salt 320 CWO 0.08 Clear Ex. 28 Nano 80S PVB2 100 3GO 40 Mgsalt 160 ITO 0.4 Clear Ex. 29 Nano 80S PVB2 100 3GO 40 Mg salt 320 ITO0.4 Clear Ex. 30 Nano 80S PVB2 100 3GO 40 Mg salt 320 CWO 0.08 Clear Ex.31 Nano 80S PVB2 100 3GO 40 Mg salt 320 CWO 0.08 Clear Ex. 32 Nano 80SPVB2 100 3GO 40 Mg salt 320 CWO 0.08 Clear Ex. 33 Nano 80S PVB2 100 3GO40 Mg salt 320 CWO 0.08 Clear

TABLE 6 Measurement results Visible light transmittance Initial Heatresistance A-Y (%) Tts (%) YI value Δ YI value Hue Ex. 6 74.5 58.2 −33.50.5 ◯◯ Ex. 7 70.8 57.0 −46.7 0.9 ◯◯ Ex. 8 75.0 57.3 −19.9 0.3 ◯◯ Ex. 973.0 56.7 −26.7 0.4 ◯◯ Ex. 22 82.8 69.1 −5.0 1.2 ◯ Ex. 23 82.9 69.2 −4.91.1 ◯ Ex. 24 74.5 59.0 −9.5 1.3 ◯◯ Ex. 25 74.5 59.1 −9.3 1.1 ◯◯ Ex. 2680.9 61.0 0.6 0.9 ◯ Ex. 27 81.0 61.0 0.7 0.9 ◯ Ex. 28 82.7 69.1 −4.7 0.9◯ Ex. 29 82.8 69.1 −4.7 0.9 ◯ Ex. 30 74.3 59.0 −9.0 0.8 ◯◯ Ex. 31 74.459.0 −8.9 0.8 ◯◯ Ex. 32 80.9 61.0 0.8 0.8 ◯ Ex. 33 81.0 61.0 0.9 0.8 ◯

EXPLANATION OF SYMBOLS

-   -   1: First resin layer    -   1 a: Outer surface    -   2: Second resin layer    -   2 a: Outer surface    -   3: Infrared ray reflection layer    -   3 a: First surface    -   3 b: Second surface    -   11: Multilayer interlayer film    -   11A: Interlayer film (single layer)    -   11 a: First surface    -   11 b: Second surface    -   21: First laminated glass member    -   22: Second laminated glass member    -   31: Laminated glass    -   31A: Laminated glass

1. An interlayer film for laminated glass, comprising an organiccoloring matter containing a transition element, a metal elementdifferent from a transition element, a thermoplastic resin and aplasticizer.
 2. The interlayer film for laminated glass according toclaim 1, wherein the metal element is a polyvalent metal element.
 3. Theinterlayer film for laminated glass according to claim 1, wherein thecontent of the metal element is greater than or equal to 20 ppm and lessthan or equal to 200 ppm.
 4. The interlayer film for laminated glassaccording to claim 1, wherein the metal element different from thetransition element is magnesium, and the metal element different fromthe transition element is added as magnesium acetate or magnesium2-ethylbutyrate to be contained.
 5. The interlayer film for laminatedglass according to claim 1, wherein the transition element in theorganic coloring matter containing a transition element is copper orvanadium, and the organic coloring matter containing a transitionelement is a phthalocyanine compound or a naphthalocyanine compound. 6.The interlayer film for laminated glass according to claim 1, whereinthe maximum absorption wavelength of the organic coloring mattercontaining a transition element is greater than or equal to 550 nm andless than or equal to 750 nm.
 7. The interlayer film for laminated glassaccording to claim 1, further comprising metal oxide particles.
 8. Theinterlayer film for laminated glass according to claim 7, wherein themetal oxide particles are tin-doped indium oxide particles or tungstenoxide particles.
 9. The interlayer film for laminated glass according toclaim 1, wherein the thermoplastic resin is a polyvinyl acetal resin.10. A multilayer interlayer film for laminated glass, comprising aninfrared ray reflection layer reflecting infrared rays and a first resinlayer containing a thermoplastic resin, wherein the first resin layer isarranged on a first surface side of the infrared ray reflection layer,and the first resin layer is an interlayer film for laminated glassaccording to claim
 1. 11. The multilayer interlayer film for laminatedglass according to claim 10, wherein the infrared ray reflection layerhas a characteristic having the infrared ray transmittance of 50% orless at one or more wavelength within the range of 780 to 2100 nm. 12.The multilayer interlayer film for laminated glass according to claim10, wherein the infrared ray reflection layer is a resin film with metalfoil, a multilayer laminated film in which a metal layer and adielectric layer are formed on a resin layer, a multilayer resin film ora liquid crystal film.
 13. The multilayer interlayer film for laminatedglass according to claim 1, wherein the thermoplastic resin contained inthe first resin layer is a polyvinyl acetal resin.
 14. The multilayerinterlayer film for laminated glass according to claim 10, wherein thefirst resin layer contains a plasticizer.
 15. The multilayer interlayerfilm for laminated glass according to claim 10, wherein the first resinlayer contains an ultraviolet ray shielding agent.
 16. The multilayerinterlayer film for laminated glass according to claim 10, comprisingthe infrared ray reflection layer reflecting infrared rays and the firstresin layer containing the thermoplastic resin, and a second resin layercontaining a thermoplastic resin, wherein the first resin layer isarranged on the first surface side of the infrared ray reflection layer,the second resin layer is arranged on a second surface side opposite tothe first surface of the infrared ray reflection layer, and at least thefirst resin layer among the first resin layer and the second resin layeris the interlayer film for laminated glass.
 17. The multilayerinterlayer film for laminated glass according to claim 16, wherein theinfrared ray transmittance in the wavelength range of 780 to 2100 nm ofthe first resin layer is higher than the infrared ray transmittance inthe wavelength range of 780 to 2100 nm of the second resin layer. 18.The multilayer interlayer film for laminated glass according to claim16, wherein the thermoplastic resin contained in the first resin layeris a polyvinyl acetal resin and the thermoplastic resin contained in thesecond resin layer is a polyvinyl acetal resin.
 19. The multilayerinterlayer film for laminated glass according to claim 16, wherein thethermoplastic resin contained in the first resin layer is a polyvinylacetal resin and the thermoplastic resin contained in the second resinlayer is a polyvinyl acetal resin.
 20. The multilayer interlayer filmfor laminated glass according to claim 16, wherein the first resin layercontains a plasticizer and the second resin layer contains aplasticizer.
 21. The multilayer interlayer film for laminated glassaccording to claim 16, wherein the first resin layer contains anultraviolet ray shielding agent and the second resin layer contains anultraviolet ray shielding agent.
 22. A laminated glass, comprising afirst laminated glass member, a second laminated glass member and aninterlayer film for laminated glass according to claim 1, wherein theinterlayer film for laminated glass is arranged between the firstlaminated glass member and the second laminated glass member. 23.Laminated glass, comprising a first laminated glass member, a secondlaminated glass member and a multilayer interlayer film for laminatedglass according to claim 10, wherein the multilayer interlayer film forlaminated glass is arranged between the first laminated glass member andthe second laminated glass member.
 24. The interlayer film for laminatedglass according to claim 1, wherein the interlayer film contains anultraviolet ray shielding agent.
 25. The interlayer film for laminatedglass according to claim 1, wherein the interlayer film contains anoxidation inhibitor.
 26. The interlayer film for laminated glassaccording to claim 1, wherein the interlayer film has a thickness of 0.1mm or more and 3 mm or less.